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Finding the Fourth Proportional to 642,366.17, 886,494.34 and 355,886.25

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Solution

The fourth proportional to 642,366.17, 886,494.34 and 355,886.25 is: 491,139.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,366.17 : 886,494.34 = 355,886.25 : x
  2. Step 2: Convert to fraction form
    642,366.17/886,494.34 = 355,886.25/x
  3. Step 3: Cross multiply
    642,366.17x = 886,494.34 × 355,886.25
  4. Step 4: Simplify right side
    642,366.17x = 315,491,146,308.83
  5. Step 5: Solve for x
    x = 315,491,146,308.83/642,366.17
  6. Step 6: Final answer
    x = 491,139.11

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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.