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Finding the Fourth Proportional to 643,287.34, 887,155.41 and 401,592.16

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Solution

The fourth proportional to 643,287.34, 887,155.41 and 401,592.16 is: 553,834.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,287.34 : 887,155.41 = 401,592.16 : x
  2. Step 2: Convert to fraction form
    643,287.34/887,155.41 = 401,592.16/x
  3. Step 3: Cross multiply
    643,287.34x = 887,155.41 × 401,592.16
  4. Step 4: Simplify right side
    643,287.34x = 356,274,657,357.59
  5. Step 5: Solve for x
    x = 356,274,657,357.59/643,287.34
  6. Step 6: Final answer
    x = 553,834.40

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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.