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Finding the Fourth Proportional to 260,318.40, 390,699.28 and 185,621.56

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Solution

The fourth proportional to 260,318.40, 390,699.28 and 185,621.56 is: 278,590.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,318.40 : 390,699.28 = 185,621.56 : x
  2. Step 2: Convert to fraction form
    260,318.40/390,699.28 = 185,621.56/x
  3. Step 3: Cross multiply
    260,318.40x = 390,699.28 × 185,621.56
  4. Step 4: Simplify right side
    260,318.40x = 72,522,209,844.48
  5. Step 5: Solve for x
    x = 72,522,209,844.48/260,318.40
  6. Step 6: Final answer
    x = 278,590.41

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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.