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Finding the Fourth Proportional to 437,624.40, 656,436.60 and 390,622.80

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Solution

The fourth proportional to 437,624.40, 656,436.60 and 390,622.80 is: 585,934.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    437,624.40 : 656,436.60 = 390,622.80 : x
  2. Step 2: Convert to fraction form
    437,624.40/656,436.60 = 390,622.80/x
  3. Step 3: Cross multiply
    437,624.40x = 656,436.60 × 390,622.80
  4. Step 4: Simplify right side
    437,624.40x = 256,419,102,714.48
  5. Step 5: Solve for x
    x = 256,419,102,714.48/437,624.40
  6. Step 6: Final answer
    x = 585,934.20

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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.