Home / 1,420,689.90-2,129,706.24-521,890.30

Finding the Fourth Proportional to 1,420,689.90, 2,129,706.24 and 521,890.30

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Solution

The fourth proportional to 1,420,689.90, 2,129,706.24 and 521,890.30 is: 782,347.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,420,689.90 : 2,129,706.24 = 521,890.30 : x
  2. Step 2: Convert to fraction form
    1,420,689.90/2,129,706.24 = 521,890.30/x
  3. Step 3: Cross multiply
    1,420,689.90x = 2,129,706.24 × 521,890.30
  4. Step 4: Simplify right side
    1,420,689.90x = 1,111,473,028,505.47
  5. Step 5: Solve for x
    x = 1,111,473,028,505.47/1,420,689.90
  6. Step 6: Final answer
    x = 782,347.39

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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.