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Finding the Fourth Proportional to 550,890.16, 760,243.56 and 309,187.76

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Solution

The fourth proportional to 550,890.16, 760,243.56 and 309,187.76 is: 426,687.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    550,890.16 : 760,243.56 = 309,187.76 : x
  2. Step 2: Convert to fraction form
    550,890.16/760,243.56 = 309,187.76/x
  3. Step 3: Cross multiply
    550,890.16x = 760,243.56 × 309,187.76
  4. Step 4: Simplify right side
    550,890.16x = 235,058,003,370.83
  5. Step 5: Solve for x
    x = 235,058,003,370.83/550,890.16
  6. Step 6: Final answer
    x = 426,687.61

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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.