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Finding the Fourth Proportional to 659,682.10, 989,851.20 and 260,335.90

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Solution

The fourth proportional to 659,682.10, 989,851.20 and 260,335.90 is: 390,633.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,682.10 : 989,851.20 = 260,335.90 : x
  2. Step 2: Convert to fraction form
    659,682.10/989,851.20 = 260,335.90/x
  3. Step 3: Cross multiply
    659,682.10x = 989,851.20 × 260,335.90
  4. Step 4: Simplify right side
    659,682.10x = 257,693,803,018.08
  5. Step 5: Solve for x
    x = 257,693,803,018.08/659,682.10
  6. Step 6: Final answer
    x = 390,633.31

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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.