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Finding the Fourth Proportional to 260,638.02, 390,987.81 and 83,082.78

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Solution

The fourth proportional to 260,638.02, 390,987.81 and 83,082.78 is: 124,633.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,638.02 : 390,987.81 = 83,082.78 : x
  2. Step 2: Convert to fraction form
    260,638.02/390,987.81 = 83,082.78/x
  3. Step 3: Cross multiply
    260,638.02x = 390,987.81 × 83,082.78
  4. Step 4: Simplify right side
    260,638.02x = 32,484,354,200.91
  5. Step 5: Solve for x
    x = 32,484,354,200.91/260,638.02
  6. Step 6: Final answer
    x = 124,633.98

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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.