Home / 289,859.42-399,821.91-209,405.18

Finding the Fourth Proportional to 289,859.42, 399,821.91 and 209,405.18

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Solution

The fourth proportional to 289,859.42, 399,821.91 and 209,405.18 is: 288,846.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,859.42 : 399,821.91 = 209,405.18 : x
  2. Step 2: Convert to fraction form
    289,859.42/399,821.91 = 209,405.18/x
  3. Step 3: Cross multiply
    289,859.42x = 399,821.91 × 209,405.18
  4. Step 4: Simplify right side
    289,859.42x = 83,724,779,031.49
  5. Step 5: Solve for x
    x = 83,724,779,031.49/289,859.42
  6. Step 6: Final answer
    x = 288,846.16

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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.