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Finding the Fourth Proportional to 440,658.28, 660,869.34 and 191,281

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Solution

The fourth proportional to 440,658.28, 660,869.34 and 191,281 is: 286,870.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    440,658.28 : 660,869.34 = 191,281 : x
  2. Step 2: Convert to fraction form
    440,658.28/660,869.34 = 191,281/x
  3. Step 3: Cross multiply
    440,658.28x = 660,869.34 × 191,281
  4. Step 4: Simplify right side
    440,658.28x = 126,411,748,224.54
  5. Step 5: Solve for x
    x = 126,411,748,224.54/440,658.28
  6. Step 6: Final answer
    x = 286,870.24

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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.