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Finding the Fourth Proportional to 417,930.30, 626,895.45 and 207,978.30

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Solution

The fourth proportional to 417,930.30, 626,895.45 and 207,978.30 is: 311,967.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    417,930.30 : 626,895.45 = 207,978.30 : x
  2. Step 2: Convert to fraction form
    417,930.30/626,895.45 = 207,978.30/x
  3. Step 3: Cross multiply
    417,930.30x = 626,895.45 × 207,978.30
  4. Step 4: Simplify right side
    417,930.30x = 130,380,649,968.74
  5. Step 5: Solve for x
    x = 130,380,649,968.74/417,930.30
  6. Step 6: Final answer
    x = 311,967.45

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Similar ratio
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1.5x scale

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.