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Finding the Fourth Proportional to 438,807.80, 658,211.70 and 306,097.40

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Solution

The fourth proportional to 438,807.80, 658,211.70 and 306,097.40 is: 459,146.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,807.80 : 658,211.70 = 306,097.40 : x
  2. Step 2: Convert to fraction form
    438,807.80/658,211.70 = 306,097.40/x
  3. Step 3: Cross multiply
    438,807.80x = 658,211.70 × 306,097.40
  4. Step 4: Simplify right side
    438,807.80x = 201,476,890,019.58
  5. Step 5: Solve for x
    x = 201,476,890,019.58/438,807.80
  6. Step 6: Final answer
    x = 459,146.10

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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.