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Finding the Fourth Proportional to 526,785, 726,963.30 and 288,321

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Solution

The fourth proportional to 526,785, 726,963.30 and 288,321 is: 397,882.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    526,785 : 726,963.30 = 288,321 : x
  2. Step 2: Convert to fraction form
    526,785/726,963.30 = 288,321/x
  3. Step 3: Cross multiply
    526,785x = 726,963.30 × 288,321
  4. Step 4: Simplify right side
    526,785x = 209,598,785,619.30
  5. Step 5: Solve for x
    x = 209,598,785,619.30/526,785
  6. Step 6: Final answer
    x = 397,882.98

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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.