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Finding the Fourth Proportional to 1,870.29, 2,805.03 and 553.91

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Solution

The fourth proportional to 1,870.29, 2,805.03 and 553.91 is: 830.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,870.29 : 2,805.03 = 553.91 : x
  2. Step 2: Convert to fraction form
    1,870.29/2,805.03 = 553.91/x
  3. Step 3: Cross multiply
    1,870.29x = 2,805.03 × 553.91
  4. Step 4: Simplify right side
    1,870.29x = 1,553,720.14
  5. Step 5: Solve for x
    x = 1,553,720.14/1,870.29
  6. Step 6: Final answer
    x = 830.74

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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.