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Finding the Fourth Proportional to 929.32, 1,392.44 and 654.06

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Solution

The fourth proportional to 929.32, 1,392.44 and 654.06 is: 980.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    929.32 : 1,392.44 = 654.06 : x
  2. Step 2: Convert to fraction form
    929.32/1,392.44 = 654.06/x
  3. Step 3: Cross multiply
    929.32x = 1,392.44 × 654.06
  4. Step 4: Simplify right side
    929.32x = 910,741.26
  5. Step 5: Solve for x
    x = 910,741.26/929.32
  6. Step 6: Final answer
    x = 980.01

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.