Home / 1,295.15-1,787.30-705.69

Finding the Fourth Proportional to 1,295.15, 1,787.30 and 705.69

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Solution

The fourth proportional to 1,295.15, 1,787.30 and 705.69 is: 973.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,295.15 : 1,787.30 = 705.69 : x
  2. Step 2: Convert to fraction form
    1,295.15/1,787.30 = 705.69/x
  3. Step 3: Cross multiply
    1,295.15x = 1,787.30 × 705.69
  4. Step 4: Simplify right side
    1,295.15x = 1,261,276.81
  5. Step 5: Solve for x
    x = 1,261,276.81/1,295.15
  6. Step 6: Final answer
    x = 973.84

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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.