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Finding the Fourth Proportional to 665.32, 919.02 and 555.16

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Solution

The fourth proportional to 665.32, 919.02 and 555.16 is: 766.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    665.32 : 919.02 = 555.16 : x
  2. Step 2: Convert to fraction form
    665.32/919.02 = 555.16/x
  3. Step 3: Cross multiply
    665.32x = 919.02 × 555.16
  4. Step 4: Simplify right side
    665.32x = 510,203.14
  5. Step 5: Solve for x
    x = 510,203.14/665.32
  6. Step 6: Final answer
    x = 766.85

Related Problems

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Half scale
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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.