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Finding the Fourth Proportional to 529.70, 794.70 and 255.40

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Solution

The fourth proportional to 529.70, 794.70 and 255.40 is: 383.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    529.70 : 794.70 = 255.40 : x
  2. Step 2: Convert to fraction form
    529.70/794.70 = 255.40/x
  3. Step 3: Cross multiply
    529.70x = 794.70 × 255.40
  4. Step 4: Simplify right side
    529.70x = 202,966.38
  5. Step 5: Solve for x
    x = 202,966.38/529.70
  6. Step 6: Final answer
    x = 383.17

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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.