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Finding the Fourth Proportional to 890.58, 1,335.59 and 313.32

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Solution

The fourth proportional to 890.58, 1,335.59 and 313.32 is: 469.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    890.58 : 1,335.59 = 313.32 : x
  2. Step 2: Convert to fraction form
    890.58/1,335.59 = 313.32/x
  3. Step 3: Cross multiply
    890.58x = 1,335.59 × 313.32
  4. Step 4: Simplify right side
    890.58x = 418,465.49
  5. Step 5: Solve for x
    x = 418,465.49/890.58
  6. Step 6: Final answer
    x = 469.88

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