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Finding the Fourth Proportional to 261,143.52, 358,031.08 and 256,419.60

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Solution

The fourth proportional to 261,143.52, 358,031.08 and 256,419.60 is: 351,554.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,143.52 : 358,031.08 = 256,419.60 : x
  2. Step 2: Convert to fraction form
    261,143.52/358,031.08 = 256,419.60/x
  3. Step 3: Cross multiply
    261,143.52x = 358,031.08 × 256,419.60
  4. Step 4: Simplify right side
    261,143.52x = 91,806,186,321.17
  5. Step 5: Solve for x
    x = 91,806,186,321.17/261,143.52
  6. Step 6: Final answer
    x = 351,554.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.