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Finding the Fourth Proportional to 1,376.08, 1,897.74 and 903.79

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Solution

The fourth proportional to 1,376.08, 1,897.74 and 903.79 is: 1,246.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,376.08 : 1,897.74 = 903.79 : x
  2. Step 2: Convert to fraction form
    1,376.08/1,897.74 = 903.79/x
  3. Step 3: Cross multiply
    1,376.08x = 1,897.74 × 903.79
  4. Step 4: Simplify right side
    1,376.08x = 1,715,152.36
  5. Step 5: Solve for x
    x = 1,715,152.36/1,376.08
  6. Step 6: Final answer
    x = 1,246.40

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1.5x scale

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.