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Finding the Fourth Proportional to 907.34, 1,253.75 and 670.95

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Solution

The fourth proportional to 907.34, 1,253.75 and 670.95 is: 927.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    907.34 : 1,253.75 = 670.95 : x
  2. Step 2: Convert to fraction form
    907.34/1,253.75 = 670.95/x
  3. Step 3: Cross multiply
    907.34x = 1,253.75 × 670.95
  4. Step 4: Simplify right side
    907.34x = 841,200.21
  5. Step 5: Solve for x
    x = 841,200.21/907.34
  6. Step 6: Final answer
    x = 927.11

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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.