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Finding the Fourth Proportional to 443,877.36, 665,618.40 and 128,259.24

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Solution

The fourth proportional to 443,877.36, 665,618.40 and 128,259.24 is: 192,331.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,877.36 : 665,618.40 = 128,259.24 : x
  2. Step 2: Convert to fraction form
    443,877.36/665,618.40 = 128,259.24/x
  3. Step 3: Cross multiply
    443,877.36x = 665,618.40 × 128,259.24
  4. Step 4: Simplify right side
    443,877.36x = 85,371,710,114.02
  5. Step 5: Solve for x
    x = 85,371,710,114.02/443,877.36
  6. Step 6: Final answer
    x = 192,331.75

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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.