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Finding the Fourth Proportional to 260,480.55, 390,728.79 and 89,700.42

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Solution

The fourth proportional to 260,480.55, 390,728.79 and 89,700.42 is: 134,553.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,480.55 : 390,728.79 = 89,700.42 : x
  2. Step 2: Convert to fraction form
    260,480.55/390,728.79 = 89,700.42/x
  3. Step 3: Cross multiply
    260,480.55x = 390,728.79 × 89,700.42
  4. Step 4: Simplify right side
    260,480.55x = 35,048,536,569.09
  5. Step 5: Solve for x
    x = 35,048,536,569.09/260,480.55
  6. Step 6: Final answer
    x = 134,553.37

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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.