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Finding the Fourth Proportional to 578,444.80, 866,792.40 and 489,215.20

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Solution

The fourth proportional to 578,444.80, 866,792.40 and 489,215.20 is: 733,082.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,444.80 : 866,792.40 = 489,215.20 : x
  2. Step 2: Convert to fraction form
    578,444.80/866,792.40 = 489,215.20/x
  3. Step 3: Cross multiply
    578,444.80x = 866,792.40 × 489,215.20
  4. Step 4: Simplify right side
    578,444.80x = 424,048,017,324.48
  5. Step 5: Solve for x
    x = 424,048,017,324.48/578,444.80
  6. Step 6: Final answer
    x = 733,082.94

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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.