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Finding the Fourth Proportional to 219,290.31, 302,623.11 and 128,647.82

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Solution

The fourth proportional to 219,290.31, 302,623.11 and 128,647.82 is: 177,535.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,290.31 : 302,623.11 = 128,647.82 : x
  2. Step 2: Convert to fraction form
    219,290.31/302,623.11 = 128,647.82/x
  3. Step 3: Cross multiply
    219,290.31x = 302,623.11 × 128,647.82
  4. Step 4: Simplify right side
    219,290.31x = 38,931,804,139.68
  5. Step 5: Solve for x
    x = 38,931,804,139.68/219,290.31
  6. Step 6: Final answer
    x = 177,535.45

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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.