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Finding the Fourth Proportional to 668.95, 922.65 and 483.05

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Solution

The fourth proportional to 668.95, 922.65 and 483.05 is: 666.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    668.95 : 922.65 = 483.05 : x
  2. Step 2: Convert to fraction form
    668.95/922.65 = 483.05/x
  3. Step 3: Cross multiply
    668.95x = 922.65 × 483.05
  4. Step 4: Simplify right side
    668.95x = 445,686.08
  5. Step 5: Solve for x
    x = 445,686.08/668.95
  6. Step 6: Final answer
    x = 666.25

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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.