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Finding the Fourth Proportional to 1,047.99, 1,444.81 and 870.32

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Solution

The fourth proportional to 1,047.99, 1,444.81 and 870.32 is: 1,199.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,047.99 : 1,444.81 = 870.32 : x
  2. Step 2: Convert to fraction form
    1,047.99/1,444.81 = 870.32/x
  3. Step 3: Cross multiply
    1,047.99x = 1,444.81 × 870.32
  4. Step 4: Simplify right side
    1,047.99x = 1,257,447.04
  5. Step 5: Solve for x
    x = 1,257,447.04/1,047.99
  6. Step 6: Final answer
    x = 1,199.87

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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.