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Finding the Fourth Proportional to 700.01, 965.95 and 420.19

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Solution

The fourth proportional to 700.01, 965.95 and 420.19 is: 579.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    700.01 : 965.95 = 420.19 : x
  2. Step 2: Convert to fraction form
    700.01/965.95 = 420.19/x
  3. Step 3: Cross multiply
    700.01x = 965.95 × 420.19
  4. Step 4: Simplify right side
    700.01x = 405,882.53
  5. Step 5: Solve for x
    x = 405,882.53/700.01
  6. Step 6: Final answer
    x = 579.82

Related Problems

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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.