Home / 912,021.70-1,368,032.55-281,128.90

Finding the Fourth Proportional to 912,021.70, 1,368,032.55 and 281,128.90

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Solution

The fourth proportional to 912,021.70, 1,368,032.55 and 281,128.90 is: 421,693.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    912,021.70 : 1,368,032.55 = 281,128.90 : x
  2. Step 2: Convert to fraction form
    912,021.70/1,368,032.55 = 281,128.90/x
  3. Step 3: Cross multiply
    912,021.70x = 1,368,032.55 × 281,128.90
  4. Step 4: Simplify right side
    912,021.70x = 384,593,485,945.70
  5. Step 5: Solve for x
    x = 384,593,485,945.70/912,021.70
  6. Step 6: Final answer
    x = 421,693.35

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Double scale
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Similar ratio
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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.