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Finding the Fourth Proportional to 1,590.99, 2,386.79 and 495.32

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Solution

The fourth proportional to 1,590.99, 2,386.79 and 495.32 is: 743.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,590.99 : 2,386.79 = 495.32 : x
  2. Step 2: Convert to fraction form
    1,590.99/2,386.79 = 495.32/x
  3. Step 3: Cross multiply
    1,590.99x = 2,386.79 × 495.32
  4. Step 4: Simplify right side
    1,590.99x = 1,182,224.82
  5. Step 5: Solve for x
    x = 1,182,224.82/1,590.99
  6. Step 6: Final answer
    x = 743.07

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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.