Home / 2,289.10-3,433.47-645.70

Finding the Fourth Proportional to 2,289.10, 3,433.47 and 645.70

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Solution

The fourth proportional to 2,289.10, 3,433.47 and 645.70 is: 968.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,289.10 : 3,433.47 = 645.70 : x
  2. Step 2: Convert to fraction form
    2,289.10/3,433.47 = 645.70/x
  3. Step 3: Cross multiply
    2,289.10x = 3,433.47 × 645.70
  4. Step 4: Simplify right side
    2,289.10x = 2,216,991.58
  5. Step 5: Solve for x
    x = 2,216,991.58/2,289.10
  6. Step 6: Final answer
    x = 968.50

Related Problems

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Half scale
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Double scale
Find fourth proportional to 2,290.10, 3,434.97 and 646.70
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1.5x scale

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.