Home / 642,769.20-887,030.32-352,408.10

Finding the Fourth Proportional to 642,769.20, 887,030.32 and 352,408.10

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Solution

The fourth proportional to 642,769.20, 887,030.32 and 352,408.10 is: 486,328.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,769.20 : 887,030.32 = 352,408.10 : x
  2. Step 2: Convert to fraction form
    642,769.20/887,030.32 = 352,408.10/x
  3. Step 3: Cross multiply
    642,769.20x = 887,030.32 × 352,408.10
  4. Step 4: Simplify right side
    642,769.20x = 312,596,669,713.59
  5. Step 5: Solve for x
    x = 312,596,669,713.59/642,769.20
  6. Step 6: Final answer
    x = 486,328.02

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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.