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Finding the Fourth Proportional to 245,221.49, 338,570.79 and 219,299.61

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Solution

The fourth proportional to 245,221.49, 338,570.79 and 219,299.61 is: 302,781.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,221.49 : 338,570.79 = 219,299.61 : x
  2. Step 2: Convert to fraction form
    245,221.49/338,570.79 = 219,299.61/x
  3. Step 3: Cross multiply
    245,221.49x = 338,570.79 × 219,299.61
  4. Step 4: Simplify right side
    245,221.49x = 74,248,443,549.77
  5. Step 5: Solve for x
    x = 74,248,443,549.77/245,221.49
  6. Step 6: Final answer
    x = 302,781.14

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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.