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Finding the Fourth Proportional to 389,437.80, 584,156.70 and 239,190.90

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Solution

The fourth proportional to 389,437.80, 584,156.70 and 239,190.90 is: 358,786.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,437.80 : 584,156.70 = 239,190.90 : x
  2. Step 2: Convert to fraction form
    389,437.80/584,156.70 = 239,190.90/x
  3. Step 3: Cross multiply
    389,437.80x = 584,156.70 × 239,190.90
  4. Step 4: Simplify right side
    389,437.80x = 139,724,966,814.03
  5. Step 5: Solve for x
    x = 139,724,966,814.03/389,437.80
  6. Step 6: Final answer
    x = 358,786.35

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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.