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Finding the Fourth Proportional to 518,641.43, 715,416.73 and 403,738.20

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Solution

The fourth proportional to 518,641.43, 715,416.73 and 403,738.20 is: 556,918.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,641.43 : 715,416.73 = 403,738.20 : x
  2. Step 2: Convert to fraction form
    518,641.43/715,416.73 = 403,738.20/x
  3. Step 3: Cross multiply
    518,641.43x = 715,416.73 × 403,738.20
  4. Step 4: Simplify right side
    518,641.43x = 288,841,061,810.74
  5. Step 5: Solve for x
    x = 288,841,061,810.74/518,641.43
  6. Step 6: Final answer
    x = 556,918.61

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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.