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Finding the Fourth Proportional to 267,712.99, 401,440.30 and 155,421.47

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Solution

The fourth proportional to 267,712.99, 401,440.30 and 155,421.47 is: 233,057.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    267,712.99 : 401,440.30 = 155,421.47 : x
  2. Step 2: Convert to fraction form
    267,712.99/401,440.30 = 155,421.47/x
  3. Step 3: Cross multiply
    267,712.99x = 401,440.30 × 155,421.47
  4. Step 4: Simplify right side
    267,712.99x = 62,392,441,543.24
  5. Step 5: Solve for x
    x = 62,392,441,543.24/267,712.99
  6. Step 6: Final answer
    x = 233,057.21

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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.