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Finding the Fourth Proportional to 838.07, 1,156.52 and 465.07

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Solution

The fourth proportional to 838.07, 1,156.52 and 465.07 is: 641.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    838.07 : 1,156.52 = 465.07 : x
  2. Step 2: Convert to fraction form
    838.07/1,156.52 = 465.07/x
  3. Step 3: Cross multiply
    838.07x = 1,156.52 × 465.07
  4. Step 4: Simplify right side
    838.07x = 537,862.76
  5. Step 5: Solve for x
    x = 537,862.76/838.07
  6. Step 6: Final answer
    x = 641.79

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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.