Home / 1,435.10-2,151.50-612.79

Finding the Fourth Proportional to 1,435.10, 2,151.50 and 612.79

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Solution

The fourth proportional to 1,435.10, 2,151.50 and 612.79 is: 918.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,435.10 : 2,151.50 = 612.79 : x
  2. Step 2: Convert to fraction form
    1,435.10/2,151.50 = 612.79/x
  3. Step 3: Cross multiply
    1,435.10x = 2,151.50 × 612.79
  4. Step 4: Simplify right side
    1,435.10x = 1,318,409.24
  5. Step 5: Solve for x
    x = 1,318,409.24/1,435.10
  6. Step 6: Final answer
    x = 918.69

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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.