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Finding the Fourth Proportional to 638,970.96, 881,775 and 352,503.12

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Solution

The fourth proportional to 638,970.96, 881,775 and 352,503.12 is: 486,451.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,970.96 : 881,775 = 352,503.12 : x
  2. Step 2: Convert to fraction form
    638,970.96/881,775 = 352,503.12/x
  3. Step 3: Cross multiply
    638,970.96x = 881,775 × 352,503.12
  4. Step 4: Simplify right side
    638,970.96x = 310,828,438,638
  5. Step 5: Solve for x
    x = 310,828,438,638/638,970.96
  6. Step 6: Final answer
    x = 486,451.59

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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.