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Finding the Fourth Proportional to 1,533.59, 2,117.07 and 903.91

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Solution

The fourth proportional to 1,533.59, 2,117.07 and 903.91 is: 1,247.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,533.59 : 2,117.07 = 903.91 : x
  2. Step 2: Convert to fraction form
    1,533.59/2,117.07 = 903.91/x
  3. Step 3: Cross multiply
    1,533.59x = 2,117.07 × 903.91
  4. Step 4: Simplify right side
    1,533.59x = 1,913,635.45
  5. Step 5: Solve for x
    x = 1,913,635.45/1,533.59
  6. Step 6: Final answer
    x = 1,247.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.