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Finding the Fourth Proportional to 3,280,487.70, 4,920,731.55 and 916,583.70

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Solution

The fourth proportional to 3,280,487.70, 4,920,731.55 and 916,583.70 is: 1,374,875.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,280,487.70 : 4,920,731.55 = 916,583.70 : x
  2. Step 2: Convert to fraction form
    3,280,487.70/4,920,731.55 = 916,583.70/x
  3. Step 3: Cross multiply
    3,280,487.70x = 4,920,731.55 × 916,583.70
  4. Step 4: Simplify right side
    3,280,487.70x = 4,510,262,330,805.73
  5. Step 5: Solve for x
    x = 4,510,262,330,805.73/3,280,487.70
  6. Step 6: Final answer
    x = 1,374,875.55

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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.