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Finding the Fourth Proportional to 943.47, 1,302.12 and 570.69

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Solution

The fourth proportional to 943.47, 1,302.12 and 570.69 is: 787.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    943.47 : 1,302.12 = 570.69 : x
  2. Step 2: Convert to fraction form
    943.47/1,302.12 = 570.69/x
  3. Step 3: Cross multiply
    943.47x = 1,302.12 × 570.69
  4. Step 4: Simplify right side
    943.47x = 743,106.86
  5. Step 5: Solve for x
    x = 743,106.86/943.47
  6. Step 6: Final answer
    x = 787.63

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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.