Home / 690,805.85-1,036,208.78-410,178.65

Finding the Fourth Proportional to 690,805.85, 1,036,208.78 and 410,178.65

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Solution

The fourth proportional to 690,805.85, 1,036,208.78 and 410,178.65 is: 615,267.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,805.85 : 1,036,208.78 = 410,178.65 : x
  2. Step 2: Convert to fraction form
    690,805.85/1,036,208.78 = 410,178.65/x
  3. Step 3: Cross multiply
    690,805.85x = 1,036,208.78 × 410,178.65
  4. Step 4: Simplify right side
    690,805.85x = 425,030,718,498.55
  5. Step 5: Solve for x
    x = 425,030,718,498.55/690,805.85
  6. Step 6: Final answer
    x = 615,267.98

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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.