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Finding the Fourth Proportional to 570,440.29, 787,216.92 and 312,312.91

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Solution

The fourth proportional to 570,440.29, 787,216.92 and 312,312.91 is: 430,996.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,440.29 : 787,216.92 = 312,312.91 : x
  2. Step 2: Convert to fraction form
    570,440.29/787,216.92 = 312,312.91/x
  3. Step 3: Cross multiply
    570,440.29x = 787,216.92 × 312,312.91
  4. Step 4: Simplify right side
    570,440.29x = 245,858,007,086.44
  5. Step 5: Solve for x
    x = 245,858,007,086.44/570,440.29
  6. Step 6: Final answer
    x = 430,996.92

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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.