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Finding the Fourth Proportional to 1,037.65, 1,431.60 and 705.50

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Solution

The fourth proportional to 1,037.65, 1,431.60 and 705.50 is: 973.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,037.65 : 1,431.60 = 705.50 : x
  2. Step 2: Convert to fraction form
    1,037.65/1,431.60 = 705.50/x
  3. Step 3: Cross multiply
    1,037.65x = 1,431.60 × 705.50
  4. Step 4: Simplify right side
    1,037.65x = 1,009,993.80
  5. Step 5: Solve for x
    x = 1,009,993.80/1,037.65
  6. Step 6: Final answer
    x = 973.35

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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.