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Finding the Fourth Proportional to 978,869.71, 1,350,819.84 and 543,261.76

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Solution

The fourth proportional to 978,869.71, 1,350,819.84 and 543,261.76 is: 749,689.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,869.71 : 1,350,819.84 = 543,261.76 : x
  2. Step 2: Convert to fraction form
    978,869.71/1,350,819.84 = 543,261.76/x
  3. Step 3: Cross multiply
    978,869.71x = 1,350,819.84 × 543,261.76
  4. Step 4: Simplify right side
    978,869.71x = 733,848,763,124.83
  5. Step 5: Solve for x
    x = 733,848,763,124.83/978,869.71
  6. Step 6: Final answer
    x = 749,689.93

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.