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Finding the Fourth Proportional to 398,691.40, 596,870.70 and 265,721.80

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Solution

The fourth proportional to 398,691.40, 596,870.70 and 265,721.80 is: 397,805.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,691.40 : 596,870.70 = 265,721.80 : x
  2. Step 2: Convert to fraction form
    398,691.40/596,870.70 = 265,721.80/x
  3. Step 3: Cross multiply
    398,691.40x = 596,870.70 × 265,721.80
  4. Step 4: Simplify right side
    398,691.40x = 158,601,556,771.26
  5. Step 5: Solve for x
    x = 158,601,556,771.26/398,691.40
  6. Step 6: Final answer
    x = 397,805.31

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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.