Home / 310,986.80-429,294.20-209,071.37

Finding the Fourth Proportional to 310,986.80, 429,294.20 and 209,071.37

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Solution

The fourth proportional to 310,986.80, 429,294.20 and 209,071.37 is: 288,607.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,986.80 : 429,294.20 = 209,071.37 : x
  2. Step 2: Convert to fraction form
    310,986.80/429,294.20 = 209,071.37/x
  3. Step 3: Cross multiply
    310,986.80x = 429,294.20 × 209,071.37
  4. Step 4: Simplify right side
    310,986.80x = 89,753,123,335.23
  5. Step 5: Solve for x
    x = 89,753,123,335.23/310,986.80
  6. Step 6: Final answer
    x = 288,607.51

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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.