Home / 690,065.66-1,035,039.02-420,123.89

Finding the Fourth Proportional to 690,065.66, 1,035,039.02 and 420,123.89

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Solution

The fourth proportional to 690,065.66, 1,035,039.02 and 420,123.89 is: 630,149.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,065.66 : 1,035,039.02 = 420,123.89 : x
  2. Step 2: Convert to fraction form
    690,065.66/1,035,039.02 = 420,123.89/x
  3. Step 3: Cross multiply
    690,065.66x = 1,035,039.02 × 420,123.89
  4. Step 4: Simplify right side
    690,065.66x = 434,844,619,871.17
  5. Step 5: Solve for x
    x = 434,844,619,871.17/690,065.66
  6. Step 6: Final answer
    x = 630,149.63

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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.