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Finding the Fourth Proportional to 661,989.40, 993,113.70 and 282,909.40

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Solution

The fourth proportional to 661,989.40, 993,113.70 and 282,909.40 is: 424,419.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,989.40 : 993,113.70 = 282,909.40 : x
  2. Step 2: Convert to fraction form
    661,989.40/993,113.70 = 282,909.40/x
  3. Step 3: Cross multiply
    661,989.40x = 993,113.70 × 282,909.40
  4. Step 4: Simplify right side
    661,989.40x = 280,961,200,998.78
  5. Step 5: Solve for x
    x = 280,961,200,998.78/661,989.40
  6. Step 6: Final answer
    x = 424,419.49

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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.