Home / 831,621.60-1,247,140.80-432,129.60

Finding the Fourth Proportional to 831,621.60, 1,247,140.80 and 432,129.60

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Solution

The fourth proportional to 831,621.60, 1,247,140.80 and 432,129.60 is: 648,042.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    831,621.60 : 1,247,140.80 = 432,129.60 : x
  2. Step 2: Convert to fraction form
    831,621.60/1,247,140.80 = 432,129.60/x
  3. Step 3: Cross multiply
    831,621.60x = 1,247,140.80 × 432,129.60
  4. Step 4: Simplify right side
    831,621.60x = 538,926,455,047.68
  5. Step 5: Solve for x
    x = 538,926,455,047.68/831,621.60
  6. Step 6: Final answer
    x = 648,042.88

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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.