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Finding the Fourth Proportional to 738.98, 1,018.76 and 529.08

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Solution

The fourth proportional to 738.98, 1,018.76 and 529.08 is: 729.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    738.98 : 1,018.76 = 529.08 : x
  2. Step 2: Convert to fraction form
    738.98/1,018.76 = 529.08/x
  3. Step 3: Cross multiply
    738.98x = 1,018.76 × 529.08
  4. Step 4: Simplify right side
    738.98x = 539,005.54
  5. Step 5: Solve for x
    x = 539,005.54/738.98
  6. Step 6: Final answer
    x = 729.39

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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.