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Finding the Fourth Proportional to 669.04, 921.26 and 630.07

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Solution

The fourth proportional to 669.04, 921.26 and 630.07 is: 867.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    669.04 : 921.26 = 630.07 : x
  2. Step 2: Convert to fraction form
    669.04/921.26 = 630.07/x
  3. Step 3: Cross multiply
    669.04x = 921.26 × 630.07
  4. Step 4: Simplify right side
    669.04x = 580,458.29
  5. Step 5: Solve for x
    x = 580,458.29/669.04
  6. Step 6: Final answer
    x = 867.60

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1.5x scale

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.