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Finding the Fourth Proportional to 763,695.60, 1,145,532.60 and 258,148.80

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Solution

The fourth proportional to 763,695.60, 1,145,532.60 and 258,148.80 is: 387,219.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    763,695.60 : 1,145,532.60 = 258,148.80 : x
  2. Step 2: Convert to fraction form
    763,695.60/1,145,532.60 = 258,148.80/x
  3. Step 3: Cross multiply
    763,695.60x = 1,145,532.60 × 258,148.80
  4. Step 4: Simplify right side
    763,695.60x = 295,717,866,050.88
  5. Step 5: Solve for x
    x = 295,717,866,050.88/763,695.60
  6. Step 6: Final answer
    x = 387,219.55

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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.