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Finding the Fourth Proportional to 263,287.60, 394,931.40 and 260,663.20

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Solution

The fourth proportional to 263,287.60, 394,931.40 and 260,663.20 is: 390,994.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,287.60 : 394,931.40 = 260,663.20 : x
  2. Step 2: Convert to fraction form
    263,287.60/394,931.40 = 260,663.20/x
  3. Step 3: Cross multiply
    263,287.60x = 394,931.40 × 260,663.20
  4. Step 4: Simplify right side
    263,287.60x = 102,944,082,504.48
  5. Step 5: Solve for x
    x = 102,944,082,504.48/263,287.60
  6. Step 6: Final answer
    x = 390,994.80

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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.