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Finding the Fourth Proportional to 643,059.04, 887,433.68 and 352,652.21

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Solution

The fourth proportional to 643,059.04, 887,433.68 and 352,652.21 is: 486,666.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,059.04 : 887,433.68 = 352,652.21 : x
  2. Step 2: Convert to fraction form
    643,059.04/887,433.68 = 352,652.21/x
  3. Step 3: Cross multiply
    643,059.04x = 887,433.68 × 352,652.21
  4. Step 4: Simplify right side
    643,059.04x = 312,955,451,868.59
  5. Step 5: Solve for x
    x = 312,955,451,868.59/643,059.04
  6. Step 6: Final answer
    x = 486,666.74

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Double scale
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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.