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Finding the Fourth Proportional to 643,064.38, 887,364.87 and 371,219.85

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Solution

The fourth proportional to 643,064.38, 887,364.87 and 371,219.85 is: 512,246.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,064.38 : 887,364.87 = 371,219.85 : x
  2. Step 2: Convert to fraction form
    643,064.38/887,364.87 = 371,219.85/x
  3. Step 3: Cross multiply
    643,064.38x = 887,364.87 × 371,219.85
  4. Step 4: Simplify right side
    643,064.38x = 329,407,453,936.67
  5. Step 5: Solve for x
    x = 329,407,453,936.67/643,064.38
  6. Step 6: Final answer
    x = 512,246.46

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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.