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Finding the Fourth Proportional to 1,047.65, 1,574.87 and 971.51

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Solution

The fourth proportional to 1,047.65, 1,574.87 and 971.51 is: 1,460.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,047.65 : 1,574.87 = 971.51 : x
  2. Step 2: Convert to fraction form
    1,047.65/1,574.87 = 971.51/x
  3. Step 3: Cross multiply
    1,047.65x = 1,574.87 × 971.51
  4. Step 4: Simplify right side
    1,047.65x = 1,529,989.22
  5. Step 5: Solve for x
    x = 1,529,989.22/1,047.65
  6. Step 6: Final answer
    x = 1,460.41

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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.