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Finding the Fourth Proportional to 647.30, 894 and 501.69

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Solution

The fourth proportional to 647.30, 894 and 501.69 is: 692.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    647.30 : 894 = 501.69 : x
  2. Step 2: Convert to fraction form
    647.30/894 = 501.69/x
  3. Step 3: Cross multiply
    647.30x = 894 × 501.69
  4. Step 4: Simplify right side
    647.30x = 448,510.86
  5. Step 5: Solve for x
    x = 448,510.86/647.30
  6. Step 6: Final answer
    x = 692.89

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Double scale
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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.