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Finding the Fourth Proportional to 312,140.80, 468,211.20 and 170,423.20

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Solution

The fourth proportional to 312,140.80, 468,211.20 and 170,423.20 is: 255,634.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,140.80 : 468,211.20 = 170,423.20 : x
  2. Step 2: Convert to fraction form
    312,140.80/468,211.20 = 170,423.20/x
  3. Step 3: Cross multiply
    312,140.80x = 468,211.20 × 170,423.20
  4. Step 4: Simplify right side
    312,140.80x = 79,794,050,979.84
  5. Step 5: Solve for x
    x = 79,794,050,979.84/312,140.80
  6. Step 6: Final answer
    x = 255,634.80

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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.