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Finding the Fourth Proportional to 570,422.68, 787,192.56 and 312,295.30

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Solution

The fourth proportional to 570,422.68, 787,192.56 and 312,295.30 is: 430,972.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,422.68 : 787,192.56 = 312,295.30 : x
  2. Step 2: Convert to fraction form
    570,422.68/787,192.56 = 312,295.30/x
  3. Step 3: Cross multiply
    570,422.68x = 787,192.56 × 312,295.30
  4. Step 4: Simplify right side
    570,422.68x = 245,836,536,682.97
  5. Step 5: Solve for x
    x = 245,836,536,682.97/570,422.68
  6. Step 6: Final answer
    x = 430,972.58

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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.