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Finding the Fourth Proportional to 487,021.80, 730,187.10 and 187,386.60

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Solution

The fourth proportional to 487,021.80, 730,187.10 and 187,386.60 is: 280,946.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,021.80 : 730,187.10 = 187,386.60 : x
  2. Step 2: Convert to fraction form
    487,021.80/730,187.10 = 187,386.60/x
  3. Step 3: Cross multiply
    487,021.80x = 730,187.10 × 187,386.60
  4. Step 4: Simplify right side
    487,021.80x = 136,827,278,032.86
  5. Step 5: Solve for x
    x = 136,827,278,032.86/487,021.80
  6. Step 6: Final answer
    x = 280,946.93

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.