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Finding the Fourth Proportional to 343,872.30, 515,808.45 and 265,140.30

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Solution

The fourth proportional to 343,872.30, 515,808.45 and 265,140.30 is: 397,710.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,872.30 : 515,808.45 = 265,140.30 : x
  2. Step 2: Convert to fraction form
    343,872.30/515,808.45 = 265,140.30/x
  3. Step 3: Cross multiply
    343,872.30x = 515,808.45 × 265,140.30
  4. Step 4: Simplify right side
    343,872.30x = 136,761,607,175.54
  5. Step 5: Solve for x
    x = 136,761,607,175.54/343,872.30
  6. Step 6: Final answer
    x = 397,710.45

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1.5x scale

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.