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Finding the Fourth Proportional to 943.55, 1,302.12 and 570.47

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Solution

The fourth proportional to 943.55, 1,302.12 and 570.47 is: 787.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    943.55 : 1,302.12 = 570.47 : x
  2. Step 2: Convert to fraction form
    943.55/1,302.12 = 570.47/x
  3. Step 3: Cross multiply
    943.55x = 1,302.12 × 570.47
  4. Step 4: Simplify right side
    943.55x = 742,811.03
  5. Step 5: Solve for x
    x = 742,811.03/943.55
  6. Step 6: Final answer
    x = 787.25

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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.