Home / 912,187.20-1,368,280.80-281,294.40

Finding the Fourth Proportional to 912,187.20, 1,368,280.80 and 281,294.40

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Solution

The fourth proportional to 912,187.20, 1,368,280.80 and 281,294.40 is: 421,941.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    912,187.20 : 1,368,280.80 = 281,294.40 : x
  2. Step 2: Convert to fraction form
    912,187.20/1,368,280.80 = 281,294.40/x
  3. Step 3: Cross multiply
    912,187.20x = 1,368,280.80 × 281,294.40
  4. Step 4: Simplify right side
    912,187.20x = 384,889,726,667.52
  5. Step 5: Solve for x
    x = 384,889,726,667.52/912,187.20
  6. Step 6: Final answer
    x = 421,941.60

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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.