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Finding the Fourth Proportional to 1,590.95, 2,385 and 810.52

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Solution

The fourth proportional to 1,590.95, 2,385 and 810.52 is: 1,215.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,590.95 : 2,385 = 810.52 : x
  2. Step 2: Convert to fraction form
    1,590.95/2,385 = 810.52/x
  3. Step 3: Cross multiply
    1,590.95x = 2,385 × 810.52
  4. Step 4: Simplify right side
    1,590.95x = 1,933,078.28
  5. Step 5: Solve for x
    x = 1,933,078.28/1,590.95
  6. Step 6: Final answer
    x = 1,215.05

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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.