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Finding the Fourth Proportional to 570,373.31, 787,131.61 and 315,740.90

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Solution

The fourth proportional to 570,373.31, 787,131.61 and 315,740.90 is: 435,731.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,373.31 : 787,131.61 = 315,740.90 : x
  2. Step 2: Convert to fraction form
    570,373.31/787,131.61 = 315,740.90/x
  3. Step 3: Cross multiply
    570,373.31x = 787,131.61 × 315,740.90
  4. Step 4: Simplify right side
    570,373.31x = 248,529,644,138.33
  5. Step 5: Solve for x
    x = 248,529,644,138.33/570,373.31
  6. Step 6: Final answer
    x = 435,731.54

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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.