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Finding the Fourth Proportional to 400,445.70, 552,560.40 and 239,266.50

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Solution

The fourth proportional to 400,445.70, 552,560.40 and 239,266.50 is: 330,155.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,445.70 : 552,560.40 = 239,266.50 : x
  2. Step 2: Convert to fraction form
    400,445.70/552,560.40 = 239,266.50/x
  3. Step 3: Cross multiply
    400,445.70x = 552,560.40 × 239,266.50
  4. Step 4: Simplify right side
    400,445.70x = 132,209,192,946.60
  5. Step 5: Solve for x
    x = 132,209,192,946.60/400,445.70
  6. Step 6: Final answer
    x = 330,155.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.