Home / 770,813.40-1,156,220.10-487,378.20

Finding the Fourth Proportional to 770,813.40, 1,156,220.10 and 487,378.20

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Solution

The fourth proportional to 770,813.40, 1,156,220.10 and 487,378.20 is: 731,067.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    770,813.40 : 1,156,220.10 = 487,378.20 : x
  2. Step 2: Convert to fraction form
    770,813.40/1,156,220.10 = 487,378.20/x
  3. Step 3: Cross multiply
    770,813.40x = 1,156,220.10 × 487,378.20
  4. Step 4: Simplify right side
    770,813.40x = 563,516,471,141.82
  5. Step 5: Solve for x
    x = 563,516,471,141.82/770,813.40
  6. Step 6: Final answer
    x = 731,067.30

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.