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Finding the Fourth Proportional to 356,379.53, 491,803.70 and 213,139.58

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Solution

The fourth proportional to 356,379.53, 491,803.70 and 213,139.58 is: 294,132.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,379.53 : 491,803.70 = 213,139.58 : x
  2. Step 2: Convert to fraction form
    356,379.53/491,803.70 = 213,139.58/x
  3. Step 3: Cross multiply
    356,379.53x = 491,803.70 × 213,139.58
  4. Step 4: Simplify right side
    356,379.53x = 104,822,830,535.73
  5. Step 5: Solve for x
    x = 104,822,830,535.73/356,379.53
  6. Step 6: Final answer
    x = 294,132.58

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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.