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Finding the Fourth Proportional to 491,486.40, 738,007.20 and 359,294.40

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Solution

The fourth proportional to 491,486.40, 738,007.20 and 359,294.40 is: 539,510.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,486.40 : 738,007.20 = 359,294.40 : x
  2. Step 2: Convert to fraction form
    491,486.40/738,007.20 = 359,294.40/x
  3. Step 3: Cross multiply
    491,486.40x = 738,007.20 × 359,294.40
  4. Step 4: Simplify right side
    491,486.40x = 265,161,854,119.68
  5. Step 5: Solve for x
    x = 265,161,854,119.68/491,486.40
  6. Step 6: Final answer
    x = 539,510.05

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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.