Home / 1,420.07-2,130.08-495.61

Finding the Fourth Proportional to 1,420.07, 2,130.08 and 495.61

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Solution

The fourth proportional to 1,420.07, 2,130.08 and 495.61 is: 743.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,420.07 : 2,130.08 = 495.61 : x
  2. Step 2: Convert to fraction form
    1,420.07/2,130.08 = 495.61/x
  3. Step 3: Cross multiply
    1,420.07x = 2,130.08 × 495.61
  4. Step 4: Simplify right side
    1,420.07x = 1,055,681.15
  5. Step 5: Solve for x
    x = 1,055,681.15/1,420.07
  6. Step 6: Final answer
    x = 743.40

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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.