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Finding the Fourth Proportional to 1,237.09, 1,853.59 and 870.09

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Solution

The fourth proportional to 1,237.09, 1,853.59 and 870.09 is: 1,303.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,237.09 : 1,853.59 = 870.09 : x
  2. Step 2: Convert to fraction form
    1,237.09/1,853.59 = 870.09/x
  3. Step 3: Cross multiply
    1,237.09x = 1,853.59 × 870.09
  4. Step 4: Simplify right side
    1,237.09x = 1,612,790.12
  5. Step 5: Solve for x
    x = 1,612,790.12/1,237.09
  6. Step 6: Final answer
    x = 1,303.70

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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.