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Finding the Fourth Proportional to 926.45, 1,388.58 and 464.09

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Solution

The fourth proportional to 926.45, 1,388.58 and 464.09 is: 695.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    926.45 : 1,388.58 = 464.09 : x
  2. Step 2: Convert to fraction form
    926.45/1,388.58 = 464.09/x
  3. Step 3: Cross multiply
    926.45x = 1,388.58 × 464.09
  4. Step 4: Simplify right side
    926.45x = 644,423.77
  5. Step 5: Solve for x
    x = 644,423.77/926.45
  6. Step 6: Final answer
    x = 695.58

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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.