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Finding the Fourth Proportional to 257,332.44, 385,986.30 and 70,344.36

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Solution

The fourth proportional to 257,332.44, 385,986.30 and 70,344.36 is: 105,513.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,332.44 : 385,986.30 = 70,344.36 : x
  2. Step 2: Convert to fraction form
    257,332.44/385,986.30 = 70,344.36/x
  3. Step 3: Cross multiply
    257,332.44x = 385,986.30 × 70,344.36
  4. Step 4: Simplify right side
    257,332.44x = 27,151,959,242.27
  5. Step 5: Solve for x
    x = 27,151,959,242.27/257,332.44
  6. Step 6: Final answer
    x = 105,513.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.