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Finding the Fourth Proportional to 947.34, 1,307.39 and 554.49

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Solution

The fourth proportional to 947.34, 1,307.39 and 554.49 is: 765.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    947.34 : 1,307.39 = 554.49 : x
  2. Step 2: Convert to fraction form
    947.34/1,307.39 = 554.49/x
  3. Step 3: Cross multiply
    947.34x = 1,307.39 × 554.49
  4. Step 4: Simplify right side
    947.34x = 724,931.91
  5. Step 5: Solve for x
    x = 724,931.91/947.34
  6. Step 6: Final answer
    x = 765.23

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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.