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Finding the Fourth Proportional to 518,791.78, 715,943.61 and 292,437.22

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Solution

The fourth proportional to 518,791.78, 715,943.61 and 292,437.22 is: 403,569.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,791.78 : 715,943.61 = 292,437.22 : x
  2. Step 2: Convert to fraction form
    518,791.78/715,943.61 = 292,437.22/x
  3. Step 3: Cross multiply
    518,791.78x = 715,943.61 × 292,437.22
  4. Step 4: Simplify right side
    518,791.78x = 209,368,558,985.16
  5. Step 5: Solve for x
    x = 209,368,558,985.16/518,791.78
  6. Step 6: Final answer
    x = 403,569.54

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Double scale
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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.