Home / 1,318,826.40-1,978,218.12-420,256.02

Finding the Fourth Proportional to 1,318,826.40, 1,978,218.12 and 420,256.02

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Solution

The fourth proportional to 1,318,826.40, 1,978,218.12 and 420,256.02 is: 630,377.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318,826.40 : 1,978,218.12 = 420,256.02 : x
  2. Step 2: Convert to fraction form
    1,318,826.40/1,978,218.12 = 420,256.02/x
  3. Step 3: Cross multiply
    1,318,826.40x = 1,978,218.12 × 420,256.02
  4. Step 4: Simplify right side
    1,318,826.40x = 831,358,073,803.08
  5. Step 5: Solve for x
    x = 831,358,073,803.08/1,318,826.40
  6. Step 6: Final answer
    x = 630,377.19

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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.