Home / 763,716.20-1,145,574.30-390,468.20

Finding the Fourth Proportional to 763,716.20, 1,145,574.30 and 390,468.20

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Solution

The fourth proportional to 763,716.20, 1,145,574.30 and 390,468.20 is: 585,702.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    763,716.20 : 1,145,574.30 = 390,468.20 : x
  2. Step 2: Convert to fraction form
    763,716.20/1,145,574.30 = 390,468.20/x
  3. Step 3: Cross multiply
    763,716.20x = 1,145,574.30 × 390,468.20
  4. Step 4: Simplify right side
    763,716.20x = 447,310,334,887.26
  5. Step 5: Solve for x
    x = 447,310,334,887.26/763,716.20
  6. Step 6: Final answer
    x = 585,702.30

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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.