Home / 310,289.28-428,071.68-197,070.72

Finding the Fourth Proportional to 310,289.28, 428,071.68 and 197,070.72

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Solution

The fourth proportional to 310,289.28, 428,071.68 and 197,070.72 is: 271,876.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,289.28 : 428,071.68 = 197,070.72 : x
  2. Step 2: Convert to fraction form
    310,289.28/428,071.68 = 197,070.72/x
  3. Step 3: Cross multiply
    310,289.28x = 428,071.68 × 197,070.72
  4. Step 4: Simplify right side
    310,289.28x = 84,360,394,189.21
  5. Step 5: Solve for x
    x = 84,360,394,189.21/310,289.28
  6. Step 6: Final answer
    x = 271,876.60

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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.