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Finding the Fourth Proportional to 518,583.75, 715,645.58 and 280,119.75

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Solution

The fourth proportional to 518,583.75, 715,645.58 and 280,119.75 is: 386,565.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,583.75 : 715,645.58 = 280,119.75 : x
  2. Step 2: Convert to fraction form
    518,583.75/715,645.58 = 280,119.75/x
  3. Step 3: Cross multiply
    518,583.75x = 715,645.58 × 280,119.75
  4. Step 4: Simplify right side
    518,583.75x = 200,466,459,557.61
  5. Step 5: Solve for x
    x = 200,466,459,557.61/518,583.75
  6. Step 6: Final answer
    x = 386,565.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.