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Finding the Fourth Proportional to 1,435.65, 2,154.15 and 705.75

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Solution

The fourth proportional to 1,435.65, 2,154.15 and 705.75 is: 1,058.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,435.65 : 2,154.15 = 705.75 : x
  2. Step 2: Convert to fraction form
    1,435.65/2,154.15 = 705.75/x
  3. Step 3: Cross multiply
    1,435.65x = 2,154.15 × 705.75
  4. Step 4: Simplify right side
    1,435.65x = 1,520,291.36
  5. Step 5: Solve for x
    x = 1,520,291.36/1,435.65
  6. Step 6: Final answer
    x = 1,058.96

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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.