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Finding the Fourth Proportional to 962.19, 1,328.26 and 647.67

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Solution

The fourth proportional to 962.19, 1,328.26 and 647.67 is: 894.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    962.19 : 1,328.26 = 647.67 : x
  2. Step 2: Convert to fraction form
    962.19/1,328.26 = 647.67/x
  3. Step 3: Cross multiply
    962.19x = 1,328.26 × 647.67
  4. Step 4: Simplify right side
    962.19x = 860,274.15
  5. Step 5: Solve for x
    x = 860,274.15/962.19
  6. Step 6: Final answer
    x = 894.08

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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.