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Finding the Fourth Proportional to 1,677.53, 2,314.99 and 931.50

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Solution

The fourth proportional to 1,677.53, 2,314.99 and 931.50 is: 1,285.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,677.53 : 2,314.99 = 931.50 : x
  2. Step 2: Convert to fraction form
    1,677.53/2,314.99 = 931.50/x
  3. Step 3: Cross multiply
    1,677.53x = 2,314.99 × 931.50
  4. Step 4: Simplify right side
    1,677.53x = 2,156,405.67
  5. Step 5: Solve for x
    x = 2,156,405.67/1,677.53
  6. Step 6: Final answer
    x = 1,285.46

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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.