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Finding the Fourth Proportional to 611,211.55, 916,443.64 and 291,461.21

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Solution

The fourth proportional to 611,211.55, 916,443.64 and 291,461.21 is: 437,013.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,211.55 : 916,443.64 = 291,461.21 : x
  2. Step 2: Convert to fraction form
    611,211.55/916,443.64 = 291,461.21/x
  3. Step 3: Cross multiply
    611,211.55x = 916,443.64 × 291,461.21
  4. Step 4: Simplify right side
    611,211.55x = 267,107,772,575.53
  5. Step 5: Solve for x
    x = 267,107,772,575.53/611,211.55
  6. Step 6: Final answer
    x = 437,013.62

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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.