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Finding the Fourth Proportional to 418,807.50, 626,626 and 248,120.85

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Solution

The fourth proportional to 418,807.50, 626,626 and 248,120.85 is: 371,242.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,807.50 : 626,626 = 248,120.85 : x
  2. Step 2: Convert to fraction form
    418,807.50/626,626 = 248,120.85/x
  3. Step 3: Cross multiply
    418,807.50x = 626,626 × 248,120.85
  4. Step 4: Simplify right side
    418,807.50x = 155,478,975,752.10
  5. Step 5: Solve for x
    x = 155,478,975,752.10/418,807.50
  6. Step 6: Final answer
    x = 371,242.10

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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.