Home / 1,285.61-1,925.64-1,065.15

Finding the Fourth Proportional to 1,285.61, 1,925.64 and 1,065.15

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Solution

The fourth proportional to 1,285.61, 1,925.64 and 1,065.15 is: 1,595.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,285.61 : 1,925.64 = 1,065.15 : x
  2. Step 2: Convert to fraction form
    1,285.61/1,925.64 = 1,065.15/x
  3. Step 3: Cross multiply
    1,285.61x = 1,925.64 × 1,065.15
  4. Step 4: Simplify right side
    1,285.61x = 2,051,095.45
  5. Step 5: Solve for x
    x = 2,051,095.45/1,285.61
  6. Step 6: Final answer
    x = 1,595.43

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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.