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Finding the Fourth Proportional to 520,063.60, 778,540.20 and 489,305.20

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Solution

The fourth proportional to 520,063.60, 778,540.20 and 489,305.20 is: 732,494.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,063.60 : 778,540.20 = 489,305.20 : x
  2. Step 2: Convert to fraction form
    520,063.60/778,540.20 = 489,305.20/x
  3. Step 3: Cross multiply
    520,063.60x = 778,540.20 × 489,305.20
  4. Step 4: Simplify right side
    520,063.60x = 380,943,768,269.04
  5. Step 5: Solve for x
    x = 380,943,768,269.04/520,063.60
  6. Step 6: Final answer
    x = 732,494.58

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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.