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Finding the Fourth Proportional to 570,472.25, 787,221.77 and 312,299.70

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Solution

The fourth proportional to 570,472.25, 787,221.77 and 312,299.70 is: 430,957.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,472.25 : 787,221.77 = 312,299.70 : x
  2. Step 2: Convert to fraction form
    570,472.25/787,221.77 = 312,299.70/x
  3. Step 3: Cross multiply
    570,472.25x = 787,221.77 × 312,299.70
  4. Step 4: Simplify right side
    570,472.25x = 245,849,122,604.47
  5. Step 5: Solve for x
    x = 245,849,122,604.47/570,472.25
  6. Step 6: Final answer
    x = 430,957.20

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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.