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Finding the Fourth Proportional to 520,046.60, 778,514.70 and 489,288.20

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Solution

The fourth proportional to 520,046.60, 778,514.70 and 489,288.20 is: 732,469.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,046.60 : 778,514.70 = 489,288.20 : x
  2. Step 2: Convert to fraction form
    520,046.60/778,514.70 = 489,288.20/x
  3. Step 3: Cross multiply
    520,046.60x = 778,514.70 × 489,288.20
  4. Step 4: Simplify right side
    520,046.60x = 380,918,056,236.54
  5. Step 5: Solve for x
    x = 380,918,056,236.54/520,046.60
  6. Step 6: Final answer
    x = 732,469.08

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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.