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Finding the Fourth Proportional to 651.85, 977.77 and 219.00

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Solution

The fourth proportional to 651.85, 977.77 and 219.00 is: 328.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.85 : 977.77 = 219.00 : x
  2. Step 2: Convert to fraction form
    651.85/977.77 = 219.00/x
  3. Step 3: Cross multiply
    651.85x = 977.77 × 219.00
  4. Step 4: Simplify right side
    651.85x = 214,135.57
  5. Step 5: Solve for x
    x = 214,135.57/651.85
  6. Step 6: Final answer
    x = 328.51

Related Problems

Find fourth proportional to 325.92, 488.89 and 109.50
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.