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Finding the Fourth Proportional to 518,335.86, 715,361.73 and 288,914.10

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Solution

The fourth proportional to 518,335.86, 715,361.73 and 288,914.10 is: 398,733.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,335.86 : 715,361.73 = 288,914.10 : x
  2. Step 2: Convert to fraction form
    518,335.86/715,361.73 = 288,914.10/x
  3. Step 3: Cross multiply
    518,335.86x = 715,361.73 × 288,914.10
  4. Step 4: Simplify right side
    518,335.86x = 206,678,090,397.39
  5. Step 5: Solve for x
    x = 206,678,090,397.39/518,335.86
  6. Step 6: Final answer
    x = 398,733.92

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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.