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Finding the Fourth Proportional to 642,626.71, 886,854.75 and 356,146.82

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Solution

The fourth proportional to 642,626.71, 886,854.75 and 356,146.82 is: 491,499.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,626.71 : 886,854.75 = 356,146.82 : x
  2. Step 2: Convert to fraction form
    642,626.71/886,854.75 = 356,146.82/x
  3. Step 3: Cross multiply
    642,626.71x = 886,854.75 × 356,146.82
  4. Step 4: Simplify right side
    642,626.71x = 315,850,499,014.40
  5. Step 5: Solve for x
    x = 315,850,499,014.40/642,626.71
  6. Step 6: Final answer
    x = 491,499.18

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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.