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Finding the Fourth Proportional to 345,108.65, 517,748.84 and 274,298.45

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Solution

The fourth proportional to 345,108.65, 517,748.84 and 274,298.45 is: 411,515.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,108.65 : 517,748.84 = 274,298.45 : x
  2. Step 2: Convert to fraction form
    345,108.65/517,748.84 = 274,298.45/x
  3. Step 3: Cross multiply
    345,108.65x = 517,748.84 × 274,298.45
  4. Step 4: Simplify right side
    345,108.65x = 142,017,702,929.81
  5. Step 5: Solve for x
    x = 142,017,702,929.81/345,108.65
  6. Step 6: Final answer
    x = 411,515.92

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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.