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Finding the Fourth Proportional to 570,399.84, 787,158 and 315,755.28

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Solution

The fourth proportional to 570,399.84, 787,158 and 315,755.28 is: 435,745.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,399.84 : 787,158 = 315,755.28 : x
  2. Step 2: Convert to fraction form
    570,399.84/787,158 = 315,755.28/x
  3. Step 3: Cross multiply
    570,399.84x = 787,158 × 315,755.28
  4. Step 4: Simplify right side
    570,399.84x = 248,549,294,694.24
  5. Step 5: Solve for x
    x = 248,549,294,694.24/570,399.84
  6. Step 6: Final answer
    x = 435,745.73

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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.