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Finding the Fourth Proportional to 356,315.88, 491,720 and 203,374.72

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Solution

The fourth proportional to 356,315.88, 491,720 and 203,374.72 is: 280,659.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,315.88 : 491,720 = 203,374.72 : x
  2. Step 2: Convert to fraction form
    356,315.88/491,720 = 203,374.72/x
  3. Step 3: Cross multiply
    356,315.88x = 491,720 × 203,374.72
  4. Step 4: Simplify right side
    356,315.88x = 100,003,417,318.40
  5. Step 5: Solve for x
    x = 100,003,417,318.40/356,315.88
  6. Step 6: Final answer
    x = 280,659.45

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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.