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Finding the Fourth Proportional to 643,442.36, 887,684.36 and 371,317.20

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Solution

The fourth proportional to 643,442.36, 887,684.36 and 371,317.20 is: 512,264.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,442.36 : 887,684.36 = 371,317.20 : x
  2. Step 2: Convert to fraction form
    643,442.36/887,684.36 = 371,317.20/x
  3. Step 3: Cross multiply
    643,442.36x = 887,684.36 × 371,317.20
  4. Step 4: Simplify right side
    643,442.36x = 329,612,469,182.41
  5. Step 5: Solve for x
    x = 329,612,469,182.41/643,442.36
  6. Step 6: Final answer
    x = 512,264.18

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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.