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Finding the Fourth Proportional to 611,487.53, 917,393.96 and 212,127.65

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Solution

The fourth proportional to 611,487.53, 917,393.96 and 212,127.65 is: 318,247.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,487.53 : 917,393.96 = 212,127.65 : x
  2. Step 2: Convert to fraction form
    611,487.53/917,393.96 = 212,127.65/x
  3. Step 3: Cross multiply
    611,487.53x = 917,393.96 × 212,127.65
  4. Step 4: Simplify right side
    611,487.53x = 194,604,627,682.80
  5. Step 5: Solve for x
    x = 194,604,627,682.80/611,487.53
  6. Step 6: Final answer
    x = 318,247.91

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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.