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Finding the Fourth Proportional to 570,422.39, 787,192.22 and 312,295.03

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Solution

The fourth proportional to 570,422.39, 787,192.22 and 312,295.03 is: 430,972.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,422.39 : 787,192.22 = 312,295.03 : x
  2. Step 2: Convert to fraction form
    570,422.39/787,192.22 = 312,295.03/x
  3. Step 3: Cross multiply
    570,422.39x = 787,192.22 × 312,295.03
  4. Step 4: Simplify right side
    570,422.39x = 245,836,216,773.42
  5. Step 5: Solve for x
    x = 245,836,216,773.42/570,422.39
  6. Step 6: Final answer
    x = 430,972.25

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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.