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Finding the Fourth Proportional to 659,432.40, 989,148.60 and 305,138.40

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Solution

The fourth proportional to 659,432.40, 989,148.60 and 305,138.40 is: 457,707.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,432.40 : 989,148.60 = 305,138.40 : x
  2. Step 2: Convert to fraction form
    659,432.40/989,148.60 = 305,138.40/x
  3. Step 3: Cross multiply
    659,432.40x = 989,148.60 × 305,138.40
  4. Step 4: Simplify right side
    659,432.40x = 301,827,221,166.24
  5. Step 5: Solve for x
    x = 301,827,221,166.24/659,432.40
  6. Step 6: Final answer
    x = 457,707.60

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Similar ratio
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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.