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Finding the Fourth Proportional to 392,660.80, 588,386.40 and 292,350.40

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Solution

The fourth proportional to 392,660.80, 588,386.40 and 292,350.40 is: 438,075.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,660.80 : 588,386.40 = 292,350.40 : x
  2. Step 2: Convert to fraction form
    392,660.80/588,386.40 = 292,350.40/x
  3. Step 3: Cross multiply
    392,660.80x = 588,386.40 × 292,350.40
  4. Step 4: Simplify right side
    392,660.80x = 172,014,999,394.56
  5. Step 5: Solve for x
    x = 172,014,999,394.56/392,660.80
  6. Step 6: Final answer
    x = 438,075.30

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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.