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Finding the Fourth Proportional to 315,132.63, 472,626.95 and 90,491.28

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Solution

The fourth proportional to 315,132.63, 472,626.95 and 90,491.28 is: 135,716.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,132.63 : 472,626.95 = 90,491.28 : x
  2. Step 2: Convert to fraction form
    315,132.63/472,626.95 = 90,491.28/x
  3. Step 3: Cross multiply
    315,132.63x = 472,626.95 × 90,491.28
  4. Step 4: Simplify right side
    315,132.63x = 42,768,615,952.20
  5. Step 5: Solve for x
    x = 42,768,615,952.20/315,132.63
  6. Step 6: Final answer
    x = 135,716.24

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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.