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Finding the Fourth Proportional to 459,627.40, 690,002.70 and 260,086.60

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Solution

The fourth proportional to 459,627.40, 690,002.70 and 260,086.60 is: 390,447.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,627.40 : 690,002.70 = 260,086.60 : x
  2. Step 2: Convert to fraction form
    459,627.40/690,002.70 = 260,086.60/x
  3. Step 3: Cross multiply
    459,627.40x = 690,002.70 × 260,086.60
  4. Step 4: Simplify right side
    459,627.40x = 179,460,456,233.82
  5. Step 5: Solve for x
    x = 179,460,456,233.82/459,627.40
  6. Step 6: Final answer
    x = 390,447.69

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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.