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Finding the Fourth Proportional to 710,291.12, 980,164.26 and 387,996.56

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Solution

The fourth proportional to 710,291.12, 980,164.26 and 387,996.56 is: 535,414.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,291.12 : 980,164.26 = 387,996.56 : x
  2. Step 2: Convert to fraction form
    710,291.12/980,164.26 = 387,996.56/x
  3. Step 3: Cross multiply
    710,291.12x = 980,164.26 × 387,996.56
  4. Step 4: Simplify right side
    710,291.12x = 380,300,361,114.95
  5. Step 5: Solve for x
    x = 380,300,361,114.95/710,291.12
  6. Step 6: Final answer
    x = 535,414.78

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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.