Home / 1,326,125.40-1,989,188.10-485,280.60

Finding the Fourth Proportional to 1,326,125.40, 1,989,188.10 and 485,280.60

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Solution

The fourth proportional to 1,326,125.40, 1,989,188.10 and 485,280.60 is: 727,920.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,326,125.40 : 1,989,188.10 = 485,280.60 : x
  2. Step 2: Convert to fraction form
    1,326,125.40/1,989,188.10 = 485,280.60/x
  3. Step 3: Cross multiply
    1,326,125.40x = 1,989,188.10 × 485,280.60
  4. Step 4: Simplify right side
    1,326,125.40x = 965,314,394,680.86
  5. Step 5: Solve for x
    x = 965,314,394,680.86/1,326,125.40
  6. Step 6: Final answer
    x = 727,920.90

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Double scale
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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.