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Finding the Fourth Proportional to 669.18, 921.56 and 627.51

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Solution

The fourth proportional to 669.18, 921.56 and 627.51 is: 864.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    669.18 : 921.56 = 627.51 : x
  2. Step 2: Convert to fraction form
    669.18/921.56 = 627.51/x
  3. Step 3: Cross multiply
    669.18x = 921.56 × 627.51
  4. Step 4: Simplify right side
    669.18x = 578,284.98
  5. Step 5: Solve for x
    x = 578,284.98/669.18
  6. Step 6: Final answer
    x = 864.17

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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.