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Finding the Fourth Proportional to 698,220, 1,047,330 and 254,988

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Solution

The fourth proportional to 698,220, 1,047,330 and 254,988 is: 382,482

Step by Step Solution

  1. Step 1: Write the proportion equation
    698,220 : 1,047,330 = 254,988 : x
  2. Step 2: Convert to fraction form
    698,220/1,047,330 = 254,988/x
  3. Step 3: Cross multiply
    698,220x = 1,047,330 × 254,988
  4. Step 4: Simplify right side
    698,220x = 267,056,582,040
  5. Step 5: Solve for x
    x = 267,056,582,040/698,220
  6. Step 6: Final answer
    x = 382,482

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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.