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Finding the Fourth Proportional to 392,918.80, 588,017.40 and 235,260.40

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Solution

The fourth proportional to 392,918.80, 588,017.40 and 235,260.40 is: 352,075.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,918.80 : 588,017.40 = 235,260.40 : x
  2. Step 2: Convert to fraction form
    392,918.80/588,017.40 = 235,260.40/x
  3. Step 3: Cross multiply
    392,918.80x = 588,017.40 × 235,260.40
  4. Step 4: Simplify right side
    392,918.80x = 138,337,208,730.96
  5. Step 5: Solve for x
    x = 138,337,208,730.96/392,918.80
  6. Step 6: Final answer
    x = 352,075.82

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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.