Home / 1,318,901.40-1,978,315.02-420,397.02

Finding the Fourth Proportional to 1,318,901.40, 1,978,315.02 and 420,397.02

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Solution

The fourth proportional to 1,318,901.40, 1,978,315.02 and 420,397.02 is: 630,583.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318,901.40 : 1,978,315.02 = 420,397.02 : x
  2. Step 2: Convert to fraction form
    1,318,901.40/1,978,315.02 = 420,397.02/x
  3. Step 3: Cross multiply
    1,318,901.40x = 1,978,315.02 × 420,397.02
  4. Step 4: Simplify right side
    1,318,901.40x = 831,677,739,029.24
  5. Step 5: Solve for x
    x = 831,677,739,029.24/1,318,901.40
  6. Step 6: Final answer
    x = 630,583.71

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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.