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Finding the Fourth Proportional to 529.98, 794.97 and 312.90

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Solution

The fourth proportional to 529.98, 794.97 and 312.90 is: 469.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    529.98 : 794.97 = 312.90 : x
  2. Step 2: Convert to fraction form
    529.98/794.97 = 312.90/x
  3. Step 3: Cross multiply
    529.98x = 794.97 × 312.90
  4. Step 4: Simplify right side
    529.98x = 248,746.11
  5. Step 5: Solve for x
    x = 248,746.11/529.98
  6. Step 6: Final answer
    x = 469.35

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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.