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Finding the Fourth Proportional to 978,638.66, 1,350,532.68 and 543,064.94

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Solution

The fourth proportional to 978,638.66, 1,350,532.68 and 543,064.94 is: 749,435.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,638.66 : 1,350,532.68 = 543,064.94 : x
  2. Step 2: Convert to fraction form
    978,638.66/1,350,532.68 = 543,064.94/x
  3. Step 3: Cross multiply
    978,638.66x = 1,350,532.68 × 543,064.94
  4. Step 4: Simplify right side
    978,638.66x = 733,426,948,832.24
  5. Step 5: Solve for x
    x = 733,426,948,832.24/978,638.66
  6. Step 6: Final answer
    x = 749,435.90

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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.