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Finding the Fourth Proportional to 978,239.70, 1,467,359.55 and 558,335.70

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Solution

The fourth proportional to 978,239.70, 1,467,359.55 and 558,335.70 is: 837,503.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,239.70 : 1,467,359.55 = 558,335.70 : x
  2. Step 2: Convert to fraction form
    978,239.70/1,467,359.55 = 558,335.70/x
  3. Step 3: Cross multiply
    978,239.70x = 1,467,359.55 × 558,335.70
  4. Step 4: Simplify right side
    978,239.70x = 819,279,221,500.94
  5. Step 5: Solve for x
    x = 819,279,221,500.94/978,239.70
  6. Step 6: Final answer
    x = 837,503.55

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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.