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Finding the Fourth Proportional to 885.02, 1,332.47 and 643.23

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Solution

The fourth proportional to 885.02, 1,332.47 and 643.23 is: 968.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    885.02 : 1,332.47 = 643.23 : x
  2. Step 2: Convert to fraction form
    885.02/1,332.47 = 643.23/x
  3. Step 3: Cross multiply
    885.02x = 1,332.47 × 643.23
  4. Step 4: Simplify right side
    885.02x = 857,086.29
  5. Step 5: Solve for x
    x = 857,086.29/885.02
  6. Step 6: Final answer
    x = 968.44

Related Problems

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.