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Finding the Fourth Proportional to 578,300.80, 866,576.40 and 489,071.20

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Solution

The fourth proportional to 578,300.80, 866,576.40 and 489,071.20 is: 732,866.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,300.80 : 866,576.40 = 489,071.20 : x
  2. Step 2: Convert to fraction form
    578,300.80/866,576.40 = 489,071.20/x
  3. Step 3: Cross multiply
    578,300.80x = 866,576.40 × 489,071.20
  4. Step 4: Simplify right side
    578,300.80x = 423,817,559,839.68
  5. Step 5: Solve for x
    x = 423,817,559,839.68/578,300.80
  6. Step 6: Final answer
    x = 732,866.98

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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.