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Finding the Fourth Proportional to 838.02, 1,156.47 and 465.00

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Solution

The fourth proportional to 838.02, 1,156.47 and 465.00 is: 641.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    838.02 : 1,156.47 = 465.00 : x
  2. Step 2: Convert to fraction form
    838.02/1,156.47 = 465.00/x
  3. Step 3: Cross multiply
    838.02x = 1,156.47 × 465.00
  4. Step 4: Simplify right side
    838.02x = 537,760.28
  5. Step 5: Solve for x
    x = 537,760.28/838.02
  6. Step 6: Final answer
    x = 641.70

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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.