Home / 831,426.90-1,247,140.35-298,965.30

Finding the Fourth Proportional to 831,426.90, 1,247,140.35 and 298,965.30

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Solution

The fourth proportional to 831,426.90, 1,247,140.35 and 298,965.30 is: 448,447.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    831,426.90 : 1,247,140.35 = 298,965.30 : x
  2. Step 2: Convert to fraction form
    831,426.90/1,247,140.35 = 298,965.30/x
  3. Step 3: Cross multiply
    831,426.90x = 1,247,140.35 × 298,965.30
  4. Step 4: Simplify right side
    831,426.90x = 372,851,688,879.86
  5. Step 5: Solve for x
    x = 372,851,688,879.86/831,426.90
  6. Step 6: Final answer
    x = 448,447.95

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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.