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Finding the Fourth Proportional to 340,402.55, 510,549.15 and 103,690.18

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Solution

The fourth proportional to 340,402.55, 510,549.15 and 103,690.18 is: 155,518.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    340,402.55 : 510,549.15 = 103,690.18 : x
  2. Step 2: Convert to fraction form
    340,402.55/510,549.15 = 103,690.18/x
  3. Step 3: Cross multiply
    340,402.55x = 510,549.15 × 103,690.18
  4. Step 4: Simplify right side
    340,402.55x = 52,938,933,262.35
  5. Step 5: Solve for x
    x = 52,938,933,262.35/340,402.55
  6. Step 6: Final answer
    x = 155,518.62

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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.