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Finding the Fourth Proportional to 402,803.91, 555,883.65 and 221,529.87

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Solution

The fourth proportional to 402,803.91, 555,883.65 and 221,529.87 is: 305,719.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,803.91 : 555,883.65 = 221,529.87 : x
  2. Step 2: Convert to fraction form
    402,803.91/555,883.65 = 221,529.87/x
  3. Step 3: Cross multiply
    402,803.91x = 555,883.65 × 221,529.87
  4. Step 4: Simplify right side
    402,803.91x = 123,144,832,719.63
  5. Step 5: Solve for x
    x = 123,144,832,719.63/402,803.91
  6. Step 6: Final answer
    x = 305,719.06

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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.