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Finding the Fourth Proportional to 402.77, 555.23 and 315.29

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Solution

The fourth proportional to 402.77, 555.23 and 315.29 is: 434.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    402.77 : 555.23 = 315.29 : x
  2. Step 2: Convert to fraction form
    402.77/555.23 = 315.29/x
  3. Step 3: Cross multiply
    402.77x = 555.23 × 315.29
  4. Step 4: Simplify right side
    402.77x = 175,054.11
  5. Step 5: Solve for x
    x = 175,054.11/402.77
  6. Step 6: Final answer
    x = 434.63

Related Problems

Find fourth proportional to 201.38, 277.61 and 157.64
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Double scale
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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.