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Finding the Fourth Proportional to 261,007.20, 391,510.80 and 228,866.40

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Solution

The fourth proportional to 261,007.20, 391,510.80 and 228,866.40 is: 343,299.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,007.20 : 391,510.80 = 228,866.40 : x
  2. Step 2: Convert to fraction form
    261,007.20/391,510.80 = 228,866.40/x
  3. Step 3: Cross multiply
    261,007.20x = 391,510.80 × 228,866.40
  4. Step 4: Simplify right side
    261,007.20x = 89,603,667,357.12
  5. Step 5: Solve for x
    x = 89,603,667,357.12/261,007.20
  6. Step 6: Final answer
    x = 343,299.60

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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.