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Finding the Fourth Proportional to 402,005.99, 554,769.38 and 220,729.66

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Solution

The fourth proportional to 402,005.99, 554,769.38 and 220,729.66 is: 304,607.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,005.99 : 554,769.38 = 220,729.66 : x
  2. Step 2: Convert to fraction form
    402,005.99/554,769.38 = 220,729.66/x
  3. Step 3: Cross multiply
    402,005.99x = 554,769.38 × 220,729.66
  4. Step 4: Simplify right side
    402,005.99x = 122,454,056,625.81
  5. Step 5: Solve for x
    x = 122,454,056,625.81/402,005.99
  6. Step 6: Final answer
    x = 304,607.54

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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.