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Finding the Fourth Proportional to 520,100.60, 778,595.70 and 489,342.20

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Solution

The fourth proportional to 520,100.60, 778,595.70 and 489,342.20 is: 732,550.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,100.60 : 778,595.70 = 489,342.20 : x
  2. Step 2: Convert to fraction form
    520,100.60/778,595.70 = 489,342.20/x
  3. Step 3: Cross multiply
    520,100.60x = 778,595.70 × 489,342.20
  4. Step 4: Simplify right side
    520,100.60x = 380,999,732,748.54
  5. Step 5: Solve for x
    x = 380,999,732,748.54/520,100.60
  6. Step 6: Final answer
    x = 732,550.07

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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.