Home / 639,102.30-882,280.77-397,462.72

Finding the Fourth Proportional to 639,102.30, 882,280.77 and 397,462.72

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Solution

The fourth proportional to 639,102.30, 882,280.77 and 397,462.72 is: 548,697.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,102.30 : 882,280.77 = 397,462.72 : x
  2. Step 2: Convert to fraction form
    639,102.30/882,280.77 = 397,462.72/x
  3. Step 3: Cross multiply
    639,102.30x = 882,280.77 × 397,462.72
  4. Step 4: Simplify right side
    639,102.30x = 350,673,714,647.89
  5. Step 5: Solve for x
    x = 350,673,714,647.89/639,102.30
  6. Step 6: Final answer
    x = 548,697.31

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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.