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Finding the Fourth Proportional to 520,086.60, 778,574.70 and 489,328.20

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Solution

The fourth proportional to 520,086.60, 778,574.70 and 489,328.20 is: 732,529.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,086.60 : 778,574.70 = 489,328.20 : x
  2. Step 2: Convert to fraction form
    520,086.60/778,574.70 = 489,328.20/x
  3. Step 3: Cross multiply
    520,086.60x = 778,574.70 × 489,328.20
  4. Step 4: Simplify right side
    520,086.60x = 380,978,556,516.54
  5. Step 5: Solve for x
    x = 380,978,556,516.54/520,086.60
  6. Step 6: Final answer
    x = 732,529.08

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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.