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Finding the Fourth Proportional to 518,785.75, 715,925.55 and 292,431.25

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Solution

The fourth proportional to 518,785.75, 715,925.55 and 292,431.25 is: 403,555.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,785.75 : 715,925.55 = 292,431.25 : x
  2. Step 2: Convert to fraction form
    518,785.75/715,925.55 = 292,431.25/x
  3. Step 3: Cross multiply
    518,785.75x = 715,925.55 × 292,431.25
  4. Step 4: Simplify right side
    518,785.75x = 209,359,003,493.44
  5. Step 5: Solve for x
    x = 209,359,003,493.44/518,785.75
  6. Step 6: Final answer
    x = 403,555.81

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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.