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Finding the Fourth Proportional to 664,281.30, 996,421.95 and 243,721.20

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Solution

The fourth proportional to 664,281.30, 996,421.95 and 243,721.20 is: 365,581.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,281.30 : 996,421.95 = 243,721.20 : x
  2. Step 2: Convert to fraction form
    664,281.30/996,421.95 = 243,721.20/x
  3. Step 3: Cross multiply
    664,281.30x = 996,421.95 × 243,721.20
  4. Step 4: Simplify right side
    664,281.30x = 242,849,153,360.34
  5. Step 5: Solve for x
    x = 242,849,153,360.34/664,281.30
  6. Step 6: Final answer
    x = 365,581.80

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Similar ratio
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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.