Home / 1,318,897.40-1,978,309.02-420,393.02

Finding the Fourth Proportional to 1,318,897.40, 1,978,309.02 and 420,393.02

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Solution

The fourth proportional to 1,318,897.40, 1,978,309.02 and 420,393.02 is: 630,577.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318,897.40 : 1,978,309.02 = 420,393.02 : x
  2. Step 2: Convert to fraction form
    1,318,897.40/1,978,309.02 = 420,393.02/x
  3. Step 3: Cross multiply
    1,318,897.40x = 1,978,309.02 × 420,393.02
  4. Step 4: Simplify right side
    1,318,897.40x = 831,667,303,411.04
  5. Step 5: Solve for x
    x = 831,667,303,411.04/1,318,897.40
  6. Step 6: Final answer
    x = 630,577.71

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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.