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Finding the Fourth Proportional to 438,142.80, 656,501.40 and 396,152.40

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Solution

The fourth proportional to 438,142.80, 656,501.40 and 396,152.40 is: 593,584.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,142.80 : 656,501.40 = 396,152.40 : x
  2. Step 2: Convert to fraction form
    438,142.80/656,501.40 = 396,152.40/x
  3. Step 3: Cross multiply
    438,142.80x = 656,501.40 × 396,152.40
  4. Step 4: Simplify right side
    438,142.80x = 260,074,605,213.36
  5. Step 5: Solve for x
    x = 260,074,605,213.36/438,142.80
  6. Step 6: Final answer
    x = 593,584.11

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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.