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Finding the Fourth Proportional to 385,423.48, 578,222.88 and 207,926.56

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Solution

The fourth proportional to 385,423.48, 578,222.88 and 207,926.56 is: 311,937.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,423.48 : 578,222.88 = 207,926.56 : x
  2. Step 2: Convert to fraction form
    385,423.48/578,222.88 = 207,926.56/x
  3. Step 3: Cross multiply
    385,423.48x = 578,222.88 × 207,926.56
  4. Step 4: Simplify right side
    385,423.48x = 120,227,894,351.69
  5. Step 5: Solve for x
    x = 120,227,894,351.69/385,423.48
  6. Step 6: Final answer
    x = 311,937.13

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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.