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Finding the Fourth Proportional to 385,863.40, 578,600.70 and 228,140.20

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Solution

The fourth proportional to 385,863.40, 578,600.70 and 228,140.20 is: 342,095.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,863.40 : 578,600.70 = 228,140.20 : x
  2. Step 2: Convert to fraction form
    385,863.40/578,600.70 = 228,140.20/x
  3. Step 3: Cross multiply
    385,863.40x = 578,600.70 × 228,140.20
  4. Step 4: Simplify right side
    385,863.40x = 132,002,079,418.14
  5. Step 5: Solve for x
    x = 132,002,079,418.14/385,863.40
  6. Step 6: Final answer
    x = 342,095.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.