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Finding the Fourth Proportional to 424,088.20, 636,132.30 and 405,886.60

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Solution

The fourth proportional to 424,088.20, 636,132.30 and 405,886.60 is: 608,829.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,088.20 : 636,132.30 = 405,886.60 : x
  2. Step 2: Convert to fraction form
    424,088.20/636,132.30 = 405,886.60/x
  3. Step 3: Cross multiply
    424,088.20x = 636,132.30 × 405,886.60
  4. Step 4: Simplify right side
    424,088.20x = 258,197,576,397.18
  5. Step 5: Solve for x
    x = 258,197,576,397.18/424,088.20
  6. Step 6: Final answer
    x = 608,829.90

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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.