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Finding the Fourth Proportional to 520,064.85, 778,542.07 and 489,306.45

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Solution

The fourth proportional to 520,064.85, 778,542.07 and 489,306.45 is: 732,496.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,064.85 : 778,542.07 = 489,306.45 : x
  2. Step 2: Convert to fraction form
    520,064.85/778,542.07 = 489,306.45/x
  3. Step 3: Cross multiply
    520,064.85x = 778,542.07 × 489,306.45
  4. Step 4: Simplify right side
    520,064.85x = 380,945,656,447.35
  5. Step 5: Solve for x
    x = 380,945,656,447.35/520,064.85
  6. Step 6: Final answer
    x = 732,496.45

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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.