Home / 639,832.80-960,080.40-261,031.20

Finding the Fourth Proportional to 639,832.80, 960,080.40 and 261,031.20

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Solution

The fourth proportional to 639,832.80, 960,080.40 and 261,031.20 is: 391,681.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,832.80 : 960,080.40 = 261,031.20 : x
  2. Step 2: Convert to fraction form
    639,832.80/960,080.40 = 261,031.20/x
  3. Step 3: Cross multiply
    639,832.80x = 960,080.40 × 261,031.20
  4. Step 4: Simplify right side
    639,832.80x = 250,610,938,908.48
  5. Step 5: Solve for x
    x = 250,610,938,908.48/639,832.80
  6. Step 6: Final answer
    x = 391,681.92

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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.