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Finding the Fourth Proportional to 1,590.66, 2,386.05 and 495.12

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Solution

The fourth proportional to 1,590.66, 2,386.05 and 495.12 is: 742.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,590.66 : 2,386.05 = 495.12 : x
  2. Step 2: Convert to fraction form
    1,590.66/2,386.05 = 495.12/x
  3. Step 3: Cross multiply
    1,590.66x = 2,386.05 × 495.12
  4. Step 4: Simplify right side
    1,590.66x = 1,181,381.08
  5. Step 5: Solve for x
    x = 1,181,381.08/1,590.66
  6. Step 6: Final answer
    x = 742.70

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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.