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Finding the Fourth Proportional to 947.79, 1,412.09 and 901.32

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Solution

The fourth proportional to 947.79, 1,412.09 and 901.32 is: 1,342.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    947.79 : 1,412.09 = 901.32 : x
  2. Step 2: Convert to fraction form
    947.79/1,412.09 = 901.32/x
  3. Step 3: Cross multiply
    947.79x = 1,412.09 × 901.32
  4. Step 4: Simplify right side
    947.79x = 1,272,740.45
  5. Step 5: Solve for x
    x = 1,272,740.45/947.79
  6. Step 6: Final answer
    x = 1,342.85

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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.