Home / 438,601.20-656,443.80-318,316.20

Finding the Fourth Proportional to 438,601.20, 656,443.80 and 318,316.20

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Solution

The fourth proportional to 438,601.20, 656,443.80 and 318,316.20 is: 476,416.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,601.20 : 656,443.80 = 318,316.20 : x
  2. Step 2: Convert to fraction form
    438,601.20/656,443.80 = 318,316.20/x
  3. Step 3: Cross multiply
    438,601.20x = 656,443.80 × 318,316.20
  4. Step 4: Simplify right side
    438,601.20x = 208,956,695,929.56
  5. Step 5: Solve for x
    x = 208,956,695,929.56/438,601.20
  6. Step 6: Final answer
    x = 476,416.15

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1.5x scale

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.