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Finding the Fourth Proportional to 389,843.60, 584,765.40 and 283,555.40

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Solution

The fourth proportional to 389,843.60, 584,765.40 and 283,555.40 is: 425,333.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,843.60 : 584,765.40 = 283,555.40 : x
  2. Step 2: Convert to fraction form
    389,843.60/584,765.40 = 283,555.40/x
  3. Step 3: Cross multiply
    389,843.60x = 584,765.40 × 283,555.40
  4. Step 4: Simplify right side
    389,843.60x = 165,813,386,903.16
  5. Step 5: Solve for x
    x = 165,813,386,903.16/389,843.60
  6. Step 6: Final answer
    x = 425,333.10

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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.