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Finding the Fourth Proportional to 1,130.65, 1,696.47 and 437.81

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Solution

The fourth proportional to 1,130.65, 1,696.47 and 437.81 is: 656.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,130.65 : 1,696.47 = 437.81 : x
  2. Step 2: Convert to fraction form
    1,130.65/1,696.47 = 437.81/x
  3. Step 3: Cross multiply
    1,130.65x = 1,696.47 × 437.81
  4. Step 4: Simplify right side
    1,130.65x = 742,733.37
  5. Step 5: Solve for x
    x = 742,733.37/1,130.65
  6. Step 6: Final answer
    x = 656.91

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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.