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Finding the Fourth Proportional to 570,494.54, 787,279.57 and 312,366.80

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Solution

The fourth proportional to 570,494.54, 787,279.57 and 312,366.80 is: 431,064.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,494.54 : 787,279.57 = 312,366.80 : x
  2. Step 2: Convert to fraction form
    570,494.54/787,279.57 = 312,366.80/x
  3. Step 3: Cross multiply
    570,494.54x = 787,279.57 × 312,366.80
  4. Step 4: Simplify right side
    570,494.54x = 245,919,996,049.88
  5. Step 5: Solve for x
    x = 245,919,996,049.88/570,494.54
  6. Step 6: Final answer
    x = 431,064.60

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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.