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Finding the Fourth Proportional to 530.78, 795.29 and 256.28

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Solution

The fourth proportional to 530.78, 795.29 and 256.28 is: 383.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    530.78 : 795.29 = 256.28 : x
  2. Step 2: Convert to fraction form
    530.78/795.29 = 256.28/x
  3. Step 3: Cross multiply
    530.78x = 795.29 × 256.28
  4. Step 4: Simplify right side
    530.78x = 203,811.66
  5. Step 5: Solve for x
    x = 203,811.66/530.78
  6. Step 6: Final answer
    x = 383.99

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.