Home / 1,318,831.16-1,978,225.26-420,260.76

Finding the Fourth Proportional to 1,318,831.16, 1,978,225.26 and 420,260.76

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Solution

The fourth proportional to 1,318,831.16, 1,978,225.26 and 420,260.76 is: 630,384.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318,831.16 : 1,978,225.26 = 420,260.76 : x
  2. Step 2: Convert to fraction form
    1,318,831.16/1,978,225.26 = 420,260.76/x
  3. Step 3: Cross multiply
    1,318,831.16x = 1,978,225.26 × 420,260.76
  4. Step 4: Simplify right side
    1,318,831.16x = 831,370,451,218.80
  5. Step 5: Solve for x
    x = 831,370,451,218.80/1,318,831.16
  6. Step 6: Final answer
    x = 630,384.30

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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.