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Finding the Fourth Proportional to 652.51, 900.89 and 478.63

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Solution

The fourth proportional to 652.51, 900.89 and 478.63 is: 660.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    652.51 : 900.89 = 478.63 : x
  2. Step 2: Convert to fraction form
    652.51/900.89 = 478.63/x
  3. Step 3: Cross multiply
    652.51x = 900.89 × 478.63
  4. Step 4: Simplify right side
    652.51x = 431,192.98
  5. Step 5: Solve for x
    x = 431,192.98/652.51
  6. Step 6: Final answer
    x = 660.82

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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.