Home / 500,253.10-690,418.12-306,776.50

Finding the Fourth Proportional to 500,253.10, 690,418.12 and 306,776.50

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Solution

The fourth proportional to 500,253.10, 690,418.12 and 306,776.50 is: 423,393.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,253.10 : 690,418.12 = 306,776.50 : x
  2. Step 2: Convert to fraction form
    500,253.10/690,418.12 = 306,776.50/x
  3. Step 3: Cross multiply
    500,253.10x = 690,418.12 × 306,776.50
  4. Step 4: Simplify right side
    500,253.10x = 211,804,054,390.18
  5. Step 5: Solve for x
    x = 211,804,054,390.18/500,253.10
  6. Step 6: Final answer
    x = 423,393.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.