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Finding the Fourth Proportional to 638,750.40, 881,456.64 and 352,270.40

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Solution

The fourth proportional to 638,750.40, 881,456.64 and 352,270.40 is: 486,122.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,750.40 : 881,456.64 = 352,270.40 : x
  2. Step 2: Convert to fraction form
    638,750.40/881,456.64 = 352,270.40/x
  3. Step 3: Cross multiply
    638,750.40x = 881,456.64 × 352,270.40
  4. Step 4: Simplify right side
    638,750.40x = 310,511,083,155.46
  5. Step 5: Solve for x
    x = 310,511,083,155.46/638,750.40
  6. Step 6: Final answer
    x = 486,122.72

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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.