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Finding the Fourth Proportional to 954.88, 1,430.72 and 918.88

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Solution

The fourth proportional to 954.88, 1,430.72 and 918.88 is: 1,376.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    954.88 : 1,430.72 = 918.88 : x
  2. Step 2: Convert to fraction form
    954.88/1,430.72 = 918.88/x
  3. Step 3: Cross multiply
    954.88x = 1,430.72 × 918.88
  4. Step 4: Simplify right side
    954.88x = 1,314,659.99
  5. Step 5: Solve for x
    x = 1,314,659.99/954.88
  6. Step 6: Final answer
    x = 1,376.78

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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.