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Finding the Fourth Proportional to 907.86, 1,244.80 and 885.98

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Solution

The fourth proportional to 907.86, 1,244.80 and 885.98 is: 1,214.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    907.86 : 1,244.80 = 885.98 : x
  2. Step 2: Convert to fraction form
    907.86/1,244.80 = 885.98/x
  3. Step 3: Cross multiply
    907.86x = 1,244.80 × 885.98
  4. Step 4: Simplify right side
    907.86x = 1,102,867.90
  5. Step 5: Solve for x
    x = 1,102,867.90/907.86
  6. Step 6: Final answer
    x = 1,214.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.