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Finding the Fourth Proportional to 653.74, 900.12 and 555.28

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Solution

The fourth proportional to 653.74, 900.12 and 555.28 is: 764.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.74 : 900.12 = 555.28 : x
  2. Step 2: Convert to fraction form
    653.74/900.12 = 555.28/x
  3. Step 3: Cross multiply
    653.74x = 900.12 × 555.28
  4. Step 4: Simplify right side
    653.74x = 499,818.63
  5. Step 5: Solve for x
    x = 499,818.63/653.74
  6. Step 6: Final answer
    x = 764.55

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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.