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Finding the Fourth Proportional to 615.40, 849.94 and 477.19

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Solution

The fourth proportional to 615.40, 849.94 and 477.19 is: 659.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.40 : 849.94 = 477.19 : x
  2. Step 2: Convert to fraction form
    615.40/849.94 = 477.19/x
  3. Step 3: Cross multiply
    615.40x = 849.94 × 477.19
  4. Step 4: Simplify right side
    615.40x = 405,582.87
  5. Step 5: Solve for x
    x = 405,582.87/615.40
  6. Step 6: Final answer
    x = 659.06

Related Problems

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Half scale
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Double scale
Find fourth proportional to 616.40, 851.32 and 478.19
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.