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Finding the Fourth Proportional to 310,295.05, 428,103.55 and 174,310.12

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Solution

The fourth proportional to 310,295.05, 428,103.55 and 174,310.12 is: 240,489.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,295.05 : 428,103.55 = 174,310.12 : x
  2. Step 2: Convert to fraction form
    310,295.05/428,103.55 = 174,310.12/x
  3. Step 3: Cross multiply
    310,295.05x = 428,103.55 × 174,310.12
  4. Step 4: Simplify right side
    310,295.05x = 74,622,779,666.89
  5. Step 5: Solve for x
    x = 74,622,779,666.89/310,295.05
  6. Step 6: Final answer
    x = 240,489.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.