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Finding the Fourth Proportional to 1,435.85, 2,153.31 and 705.93

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Solution

The fourth proportional to 1,435.85, 2,153.31 and 705.93 is: 1,058.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,435.85 : 2,153.31 = 705.93 : x
  2. Step 2: Convert to fraction form
    1,435.85/2,153.31 = 705.93/x
  3. Step 3: Cross multiply
    1,435.85x = 2,153.31 × 705.93
  4. Step 4: Simplify right side
    1,435.85x = 1,520,086.13
  5. Step 5: Solve for x
    x = 1,520,086.13/1,435.85
  6. Step 6: Final answer
    x = 1,058.67

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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.