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Finding the Fourth Proportional to 639,790.80, 960,031.80 and 265,851.60

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Solution

The fourth proportional to 639,790.80, 960,031.80 and 265,851.60 is: 398,921.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,790.80 : 960,031.80 = 265,851.60 : x
  2. Step 2: Convert to fraction form
    639,790.80/960,031.80 = 265,851.60/x
  3. Step 3: Cross multiply
    639,790.80x = 960,031.80 × 265,851.60
  4. Step 4: Simplify right side
    639,790.80x = 255,225,990,080.88
  5. Step 5: Solve for x
    x = 255,225,990,080.88/639,790.80
  6. Step 6: Final answer
    x = 398,921.01

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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.