Home / 420,289.18-579,998.40-229,302.58

Finding the Fourth Proportional to 420,289.18, 579,998.40 and 229,302.58

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Solution

The fourth proportional to 420,289.18, 579,998.40 and 229,302.58 is: 316,437.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,289.18 : 579,998.40 = 229,302.58 : x
  2. Step 2: Convert to fraction form
    420,289.18/579,998.40 = 229,302.58/x
  3. Step 3: Cross multiply
    420,289.18x = 579,998.40 × 229,302.58
  4. Step 4: Simplify right side
    420,289.18x = 132,995,129,515.87
  5. Step 5: Solve for x
    x = 132,995,129,515.87/420,289.18
  6. Step 6: Final answer
    x = 316,437.20

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1.5x scale

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.