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Finding the Fourth Proportional to 402,164.80, 603,247.20 and 307,686.40

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Solution

The fourth proportional to 402,164.80, 603,247.20 and 307,686.40 is: 461,529.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,164.80 : 603,247.20 = 307,686.40 : x
  2. Step 2: Convert to fraction form
    402,164.80/603,247.20 = 307,686.40/x
  3. Step 3: Cross multiply
    402,164.80x = 603,247.20 × 307,686.40
  4. Step 4: Simplify right side
    402,164.80x = 185,610,959,278.08
  5. Step 5: Solve for x
    x = 185,610,959,278.08/402,164.80
  6. Step 6: Final answer
    x = 461,529.60

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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.