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Finding the Fourth Proportional to 638,174.16, 880,698.80 and 351,712.70

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Solution

The fourth proportional to 638,174.16, 880,698.80 and 351,712.70 is: 485,373.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,174.16 : 880,698.80 = 351,712.70 : x
  2. Step 2: Convert to fraction form
    638,174.16/880,698.80 = 351,712.70/x
  3. Step 3: Cross multiply
    638,174.16x = 880,698.80 × 351,712.70
  4. Step 4: Simplify right side
    638,174.16x = 309,752,952,834.76
  5. Step 5: Solve for x
    x = 309,752,952,834.76/638,174.16
  6. Step 6: Final answer
    x = 485,373.70

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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.