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Finding the Fourth Proportional to 442,859.70, 664,289.55 and 438,923.10

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Solution

The fourth proportional to 442,859.70, 664,289.55 and 438,923.10 is: 658,384.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,859.70 : 664,289.55 = 438,923.10 : x
  2. Step 2: Convert to fraction form
    442,859.70/664,289.55 = 438,923.10/x
  3. Step 3: Cross multiply
    442,859.70x = 664,289.55 × 438,923.10
  4. Step 4: Simplify right side
    442,859.70x = 291,572,028,583.61
  5. Step 5: Solve for x
    x = 291,572,028,583.61/442,859.70
  6. Step 6: Final answer
    x = 658,384.65

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Double scale
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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.