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Finding the Fourth Proportional to 518,291.08, 715,214.10 and 291,922

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Solution

The fourth proportional to 518,291.08, 715,214.10 and 291,922 is: 402,836.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,291.08 : 715,214.10 = 291,922 : x
  2. Step 2: Convert to fraction form
    518,291.08/715,214.10 = 291,922/x
  3. Step 3: Cross multiply
    518,291.08x = 715,214.10 × 291,922
  4. Step 4: Simplify right side
    518,291.08x = 208,786,730,500.20
  5. Step 5: Solve for x
    x = 208,786,730,500.20/518,291.08
  6. Step 6: Final answer
    x = 402,836.82

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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.