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Finding the Fourth Proportional to 389,433.80, 584,150.70 and 239,186.90

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Solution

The fourth proportional to 389,433.80, 584,150.70 and 239,186.90 is: 358,780.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,433.80 : 584,150.70 = 239,186.90 : x
  2. Step 2: Convert to fraction form
    389,433.80/584,150.70 = 239,186.90/x
  3. Step 3: Cross multiply
    389,433.80x = 584,150.70 × 239,186.90
  4. Step 4: Simplify right side
    389,433.80x = 139,721,195,065.83
  5. Step 5: Solve for x
    x = 139,721,195,065.83/389,433.80
  6. Step 6: Final answer
    x = 358,780.35

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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.