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Finding the Fourth Proportional to 437,521.20, 656,427.60 and 390,487.20

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Solution

The fourth proportional to 437,521.20, 656,427.60 and 390,487.20 is: 585,860.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    437,521.20 : 656,427.60 = 390,487.20 : x
  2. Step 2: Convert to fraction form
    437,521.20/656,427.60 = 390,487.20/x
  3. Step 3: Cross multiply
    437,521.20x = 656,427.60 × 390,487.20
  4. Step 4: Simplify right side
    437,521.20x = 256,326,575,526.72
  5. Step 5: Solve for x
    x = 256,326,575,526.72/437,521.20
  6. Step 6: Final answer
    x = 585,860.93

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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.