Home / 1,430.19-1,973.32-905.92

Finding the Fourth Proportional to 1,430.19, 1,973.32 and 905.92

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Solution

The fourth proportional to 1,430.19, 1,973.32 and 905.92 is: 1,249.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,430.19 : 1,973.32 = 905.92 : x
  2. Step 2: Convert to fraction form
    1,430.19/1,973.32 = 905.92/x
  3. Step 3: Cross multiply
    1,430.19x = 1,973.32 × 905.92
  4. Step 4: Simplify right side
    1,430.19x = 1,787,662.86
  5. Step 5: Solve for x
    x = 1,787,662.86/1,430.19
  6. Step 6: Final answer
    x = 1,249.95

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Half scale
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Double scale
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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.