Home / 1,272,010.20-1,908,015.30-768,125.40

Finding the Fourth Proportional to 1,272,010.20, 1,908,015.30 and 768,125.40

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Solution

The fourth proportional to 1,272,010.20, 1,908,015.30 and 768,125.40 is: 1,152,188.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,272,010.20 : 1,908,015.30 = 768,125.40 : x
  2. Step 2: Convert to fraction form
    1,272,010.20/1,908,015.30 = 768,125.40/x
  3. Step 3: Cross multiply
    1,272,010.20x = 1,908,015.30 × 768,125.40
  4. Step 4: Simplify right side
    1,272,010.20x = 1,465,595,015,518.62
  5. Step 5: Solve for x
    x = 1,465,595,015,518.62/1,272,010.20
  6. Step 6: Final answer
    x = 1,152,188.10

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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.