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Finding the Fourth Proportional to 666.77, 919.08 and 508.88

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Solution

The fourth proportional to 666.77, 919.08 and 508.88 is: 701.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.77 : 919.08 = 508.88 : x
  2. Step 2: Convert to fraction form
    666.77/919.08 = 508.88/x
  3. Step 3: Cross multiply
    666.77x = 919.08 × 508.88
  4. Step 4: Simplify right side
    666.77x = 467,703.73
  5. Step 5: Solve for x
    x = 467,703.73/666.77
  6. Step 6: Final answer
    x = 701.45

Related Problems

Find fourth proportional to 333.38, 459.54 and 254.44
Half scale
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Double scale
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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.