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Finding the Fourth Proportional to 369,988.79, 554,758.45 and 145,079.78

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Solution

The fourth proportional to 369,988.79, 554,758.45 and 145,079.78 is: 217,531.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    369,988.79 : 554,758.45 = 145,079.78 : x
  2. Step 2: Convert to fraction form
    369,988.79/554,758.45 = 145,079.78/x
  3. Step 3: Cross multiply
    369,988.79x = 554,758.45 × 145,079.78
  4. Step 4: Simplify right side
    369,988.79x = 80,484,230,742.65
  5. Step 5: Solve for x
    x = 80,484,230,742.65/369,988.79
  6. Step 6: Final answer
    x = 217,531.54

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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.