Home / 690,906.84-1,035,574.08-420,438.45

Finding the Fourth Proportional to 690,906.84, 1,035,574.08 and 420,438.45

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Solution

The fourth proportional to 690,906.84, 1,035,574.08 and 420,438.45 is: 630,179.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,906.84 : 1,035,574.08 = 420,438.45 : x
  2. Step 2: Convert to fraction form
    690,906.84/1,035,574.08 = 420,438.45/x
  3. Step 3: Cross multiply
    690,906.84x = 1,035,574.08 × 420,438.45
  4. Step 4: Simplify right side
    690,906.84x = 435,395,161,055.38
  5. Step 5: Solve for x
    x = 435,395,161,055.38/690,906.84
  6. Step 6: Final answer
    x = 630,179.26

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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.