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Finding the Fourth Proportional to 489,815.60, 734,723.40 and 486,705.20

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Solution

The fourth proportional to 489,815.60, 734,723.40 and 486,705.20 is: 730,057.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,815.60 : 734,723.40 = 486,705.20 : x
  2. Step 2: Convert to fraction form
    489,815.60/734,723.40 = 486,705.20/x
  3. Step 3: Cross multiply
    489,815.60x = 734,723.40 × 486,705.20
  4. Step 4: Simplify right side
    489,815.60x = 357,593,699,341.68
  5. Step 5: Solve for x
    x = 357,593,699,341.68/489,815.60
  6. Step 6: Final answer
    x = 730,057.80

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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.