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Finding the Fourth Proportional to 638,357.72, 880,920.51 and 347,966.78

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Solution

The fourth proportional to 638,357.72, 880,920.51 and 347,966.78 is: 480,186.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,357.72 : 880,920.51 = 347,966.78 : x
  2. Step 2: Convert to fraction form
    638,357.72/880,920.51 = 347,966.78/x
  3. Step 3: Cross multiply
    638,357.72x = 880,920.51 × 347,966.78
  4. Step 4: Simplify right side
    638,357.72x = 306,531,073,300.66
  5. Step 5: Solve for x
    x = 306,531,073,300.66/638,357.72
  6. Step 6: Final answer
    x = 480,186.99

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1.5x scale

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.