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Finding the Fourth Proportional to 479,136.66, 660,601.54 and 315,767.76

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Solution

The fourth proportional to 479,136.66, 660,601.54 and 315,767.76 is: 435,359.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,136.66 : 660,601.54 = 315,767.76 : x
  2. Step 2: Convert to fraction form
    479,136.66/660,601.54 = 315,767.76/x
  3. Step 3: Cross multiply
    479,136.66x = 660,601.54 × 315,767.76
  4. Step 4: Simplify right side
    479,136.66x = 208,596,668,538.35
  5. Step 5: Solve for x
    x = 208,596,668,538.35/479,136.66
  6. Step 6: Final answer
    x = 435,359.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.