Home / 1,318,875.15-1,978,275.67-420,370.71

Finding the Fourth Proportional to 1,318,875.15, 1,978,275.67 and 420,370.71

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Solution

The fourth proportional to 1,318,875.15, 1,978,275.67 and 420,370.71 is: 630,544.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318,875.15 : 1,978,275.67 = 420,370.71 : x
  2. Step 2: Convert to fraction form
    1,318,875.15/1,978,275.67 = 420,370.71/x
  3. Step 3: Cross multiply
    1,318,875.15x = 1,978,275.67 × 420,370.71
  4. Step 4: Simplify right side
    1,318,875.15x = 831,609,135,980.39
  5. Step 5: Solve for x
    x = 831,609,135,980.39/1,318,875.15
  6. Step 6: Final answer
    x = 630,544.25

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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.