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Finding the Fourth Proportional to 443,685.24, 665,430.12 and 128,073.60

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Solution

The fourth proportional to 443,685.24, 665,430.12 and 128,073.60 is: 192,082.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,685.24 : 665,430.12 = 128,073.60 : x
  2. Step 2: Convert to fraction form
    443,685.24/665,430.12 = 128,073.60/x
  3. Step 3: Cross multiply
    443,685.24x = 665,430.12 × 128,073.60
  4. Step 4: Simplify right side
    443,685.24x = 85,224,031,016.83
  5. Step 5: Solve for x
    x = 85,224,031,016.83/443,685.24
  6. Step 6: Final answer
    x = 192,082.19

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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.