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Finding the Fourth Proportional to 402,748.89, 555,795.47 and 221,472.51

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Solution

The fourth proportional to 402,748.89, 555,795.47 and 221,472.51 is: 305,633.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,748.89 : 555,795.47 = 221,472.51 : x
  2. Step 2: Convert to fraction form
    402,748.89/555,795.47 = 221,472.51/x
  3. Step 3: Cross multiply
    402,748.89x = 555,795.47 × 221,472.51
  4. Step 4: Simplify right side
    402,748.89x = 123,093,417,510.69
  5. Step 5: Solve for x
    x = 123,093,417,510.69/402,748.89
  6. Step 6: Final answer
    x = 305,633.16

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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.