Home / 1,319,049.69-1,978,717.90-420,280.17

Finding the Fourth Proportional to 1,319,049.69, 1,978,717.90 and 420,280.17

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Solution

The fourth proportional to 1,319,049.69, 1,978,717.90 and 420,280.17 is: 630,465.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319,049.69 : 1,978,717.90 = 420,280.17 : x
  2. Step 2: Convert to fraction form
    1,319,049.69/1,978,717.90 = 420,280.17/x
  3. Step 3: Cross multiply
    1,319,049.69x = 1,978,717.90 × 420,280.17
  4. Step 4: Simplify right side
    1,319,049.69x = 831,615,885,500.45
  5. Step 5: Solve for x
    x = 831,615,885,500.45/1,319,049.69
  6. Step 6: Final answer
    x = 630,465.93

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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.