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Finding the Fourth Proportional to 340,390.55, 510,531.15 and 103,678.18

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Solution

The fourth proportional to 340,390.55, 510,531.15 and 103,678.18 is: 155,500.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    340,390.55 : 510,531.15 = 103,678.18 : x
  2. Step 2: Convert to fraction form
    340,390.55/510,531.15 = 103,678.18/x
  3. Step 3: Cross multiply
    340,390.55x = 510,531.15 × 103,678.18
  4. Step 4: Simplify right side
    340,390.55x = 52,930,940,465.31
  5. Step 5: Solve for x
    x = 52,930,940,465.31/340,390.55
  6. Step 6: Final answer
    x = 155,500.62

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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.