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Finding the Fourth Proportional to 389,618.80, 584,428.20 and 360,750.40

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Solution

The fourth proportional to 389,618.80, 584,428.20 and 360,750.40 is: 541,125.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,618.80 : 584,428.20 = 360,750.40 : x
  2. Step 2: Convert to fraction form
    389,618.80/584,428.20 = 360,750.40/x
  3. Step 3: Cross multiply
    389,618.80x = 584,428.20 × 360,750.40
  4. Step 4: Simplify right side
    389,618.80x = 210,832,706,921.28
  5. Step 5: Solve for x
    x = 210,832,706,921.28/389,618.80
  6. Step 6: Final answer
    x = 541,125.60

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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.