Home / 389,823.40-584,297.70-221,424.40

Finding the Fourth Proportional to 389,823.40, 584,297.70 and 221,424.40

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Solution

The fourth proportional to 389,823.40, 584,297.70 and 221,424.40 is: 331,888.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,823.40 : 584,297.70 = 221,424.40 : x
  2. Step 2: Convert to fraction form
    389,823.40/584,297.70 = 221,424.40/x
  3. Step 3: Cross multiply
    389,823.40x = 584,297.70 × 221,424.40
  4. Step 4: Simplify right side
    389,823.40x = 129,377,767,643.88
  5. Step 5: Solve for x
    x = 129,377,767,643.88/389,823.40
  6. Step 6: Final answer
    x = 331,888.15

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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.