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Finding the Fourth Proportional to 518,489.76, 715,590 and 292,156.32

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Solution

The fourth proportional to 518,489.76, 715,590 and 292,156.32 is: 403,217.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,489.76 : 715,590 = 292,156.32 : x
  2. Step 2: Convert to fraction form
    518,489.76/715,590 = 292,156.32/x
  3. Step 3: Cross multiply
    518,489.76x = 715,590 × 292,156.32
  4. Step 4: Simplify right side
    518,489.76x = 209,064,141,028.80
  5. Step 5: Solve for x
    x = 209,064,141,028.80/518,489.76
  6. Step 6: Final answer
    x = 403,217.49

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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.