Home / 905,665.57-1,249,821.22-497,809.21

Finding the Fourth Proportional to 905,665.57, 1,249,821.22 and 497,809.21

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Solution

The fourth proportional to 905,665.57, 1,249,821.22 and 497,809.21 is: 686,978.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    905,665.57 : 1,249,821.22 = 497,809.21 : x
  2. Step 2: Convert to fraction form
    905,665.57/1,249,821.22 = 497,809.21/x
  3. Step 3: Cross multiply
    905,665.57x = 1,249,821.22 × 497,809.21
  4. Step 4: Simplify right side
    905,665.57x = 622,172,509,800.36
  5. Step 5: Solve for x
    x = 622,172,509,800.36/905,665.57
  6. Step 6: Final answer
    x = 686,978.21

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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.