Home / 912,105.20-1,368,157.80-281,212.40

Finding the Fourth Proportional to 912,105.20, 1,368,157.80 and 281,212.40

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Solution

The fourth proportional to 912,105.20, 1,368,157.80 and 281,212.40 is: 421,818.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    912,105.20 : 1,368,157.80 = 281,212.40 : x
  2. Step 2: Convert to fraction form
    912,105.20/1,368,157.80 = 281,212.40/x
  3. Step 3: Cross multiply
    912,105.20x = 1,368,157.80 × 281,212.40
  4. Step 4: Simplify right side
    912,105.20x = 384,742,938,516.72
  5. Step 5: Solve for x
    x = 384,742,938,516.72/912,105.20
  6. Step 6: Final answer
    x = 421,818.60

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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.