Home / 1,490.16-2,237.68-916.68

Finding the Fourth Proportional to 1,490.16, 2,237.68 and 916.68

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Solution

The fourth proportional to 1,490.16, 2,237.68 and 916.68 is: 1,376.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,490.16 : 2,237.68 = 916.68 : x
  2. Step 2: Convert to fraction form
    1,490.16/2,237.68 = 916.68/x
  3. Step 3: Cross multiply
    1,490.16x = 2,237.68 × 916.68
  4. Step 4: Simplify right side
    1,490.16x = 2,051,236.50
  5. Step 5: Solve for x
    x = 2,051,236.50/1,490.16
  6. Step 6: Final answer
    x = 1,376.52

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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.