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Finding the Fourth Proportional to 634.30, 875.47 and 368.78

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Solution

The fourth proportional to 634.30, 875.47 and 368.78 is: 509.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    634.30 : 875.47 = 368.78 : x
  2. Step 2: Convert to fraction form
    634.30/875.47 = 368.78/x
  3. Step 3: Cross multiply
    634.30x = 875.47 × 368.78
  4. Step 4: Simplify right side
    634.30x = 322,857.09
  5. Step 5: Solve for x
    x = 322,857.09/634.30
  6. Step 6: Final answer
    x = 509.00

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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.