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Finding the Fourth Proportional to 978,885.47, 1,350,743.95 and 543,300.68

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Solution

The fourth proportional to 978,885.47, 1,350,743.95 and 543,300.68 is: 749,689.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,885.47 : 1,350,743.95 = 543,300.68 : x
  2. Step 2: Convert to fraction form
    978,885.47/1,350,743.95 = 543,300.68/x
  3. Step 3: Cross multiply
    978,885.47x = 1,350,743.95 × 543,300.68
  4. Step 4: Simplify right side
    978,885.47x = 733,860,110,596.87
  5. Step 5: Solve for x
    x = 733,860,110,596.87/978,885.47
  6. Step 6: Final answer
    x = 749,689.45

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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.