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Finding the Fourth Proportional to 518,608, 715,661.12 and 292,240

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Solution

The fourth proportional to 518,608, 715,661.12 and 292,240 is: 403,281.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,608 : 715,661.12 = 292,240 : x
  2. Step 2: Convert to fraction form
    518,608/715,661.12 = 292,240/x
  3. Step 3: Cross multiply
    518,608x = 715,661.12 × 292,240
  4. Step 4: Simplify right side
    518,608x = 209,144,805,708.80
  5. Step 5: Solve for x
    x = 209,144,805,708.80/518,608
  6. Step 6: Final answer
    x = 403,281.10

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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.