Home / 620,631.18-931,019.67-221,328.72

Finding the Fourth Proportional to 620,631.18, 931,019.67 and 221,328.72

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Solution

The fourth proportional to 620,631.18, 931,019.67 and 221,328.72 is: 332,019.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,631.18 : 931,019.67 = 221,328.72 : x
  2. Step 2: Convert to fraction form
    620,631.18/931,019.67 = 221,328.72/x
  3. Step 3: Cross multiply
    620,631.18x = 931,019.67 × 221,328.72
  4. Step 4: Simplify right side
    620,631.18x = 206,061,391,855.92
  5. Step 5: Solve for x
    x = 206,061,391,855.92/620,631.18
  6. Step 6: Final answer
    x = 332,019.08

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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.