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Finding the Fourth Proportional to 440,136.48, 660,370.80 and 155,815.55

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Solution

The fourth proportional to 440,136.48, 660,370.80 and 155,815.55 is: 233,782.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    440,136.48 : 660,370.80 = 155,815.55 : x
  2. Step 2: Convert to fraction form
    440,136.48/660,370.80 = 155,815.55/x
  3. Step 3: Cross multiply
    440,136.48x = 660,370.80 × 155,815.55
  4. Step 4: Simplify right side
    440,136.48x = 102,896,038,726.55
  5. Step 5: Solve for x
    x = 102,896,038,726.55/440,136.48
  6. Step 6: Final answer
    x = 233,782.12

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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.