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Finding the Fourth Proportional to 261,006.20, 391,509.30 and 254,445.20

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Solution

The fourth proportional to 261,006.20, 391,509.30 and 254,445.20 is: 381,667.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,006.20 : 391,509.30 = 254,445.20 : x
  2. Step 2: Convert to fraction form
    261,006.20/391,509.30 = 254,445.20/x
  3. Step 3: Cross multiply
    261,006.20x = 391,509.30 × 254,445.20
  4. Step 4: Simplify right side
    261,006.20x = 99,617,662,140.36
  5. Step 5: Solve for x
    x = 99,617,662,140.36/261,006.20
  6. Step 6: Final answer
    x = 381,667.80

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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.