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Finding the Fourth Proportional to 1,255.45, 1,875.98 and 957.32

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Solution

The fourth proportional to 1,255.45, 1,875.98 and 957.32 is: 1,430.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,255.45 : 1,875.98 = 957.32 : x
  2. Step 2: Convert to fraction form
    1,255.45/1,875.98 = 957.32/x
  3. Step 3: Cross multiply
    1,255.45x = 1,875.98 × 957.32
  4. Step 4: Simplify right side
    1,255.45x = 1,795,913.17
  5. Step 5: Solve for x
    x = 1,795,913.17/1,255.45
  6. Step 6: Final answer
    x = 1,430.49

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.