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Finding the Fourth Proportional to 630.74, 870.48 and 368.75

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Solution

The fourth proportional to 630.74, 870.48 and 368.75 is: 508.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.74 : 870.48 = 368.75 : x
  2. Step 2: Convert to fraction form
    630.74/870.48 = 368.75/x
  3. Step 3: Cross multiply
    630.74x = 870.48 × 368.75
  4. Step 4: Simplify right side
    630.74x = 320,989.50
  5. Step 5: Solve for x
    x = 320,989.50/630.74
  6. Step 6: Final answer
    x = 508.91

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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.