Home / 917,688.20-1,376,532.30-386,247.20

Finding the Fourth Proportional to 917,688.20, 1,376,532.30 and 386,247.20

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Solution

The fourth proportional to 917,688.20, 1,376,532.30 and 386,247.20 is: 579,370.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    917,688.20 : 1,376,532.30 = 386,247.20 : x
  2. Step 2: Convert to fraction form
    917,688.20/1,376,532.30 = 386,247.20/x
  3. Step 3: Cross multiply
    917,688.20x = 1,376,532.30 × 386,247.20
  4. Step 4: Simplify right side
    917,688.20x = 531,681,746,584.56
  5. Step 5: Solve for x
    x = 531,681,746,584.56/917,688.20
  6. Step 6: Final answer
    x = 579,370.80

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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.