Home / 905,639.12-1,249,788.72-497,747.90

Finding the Fourth Proportional to 905,639.12, 1,249,788.72 and 497,747.90

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Solution

The fourth proportional to 905,639.12, 1,249,788.72 and 497,747.90 is: 686,895.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    905,639.12 : 1,249,788.72 = 497,747.90 : x
  2. Step 2: Convert to fraction form
    905,639.12/1,249,788.72 = 497,747.90/x
  3. Step 3: Cross multiply
    905,639.12x = 1,249,788.72 × 497,747.90
  4. Step 4: Simplify right side
    905,639.12x = 622,079,710,823.69
  5. Step 5: Solve for x
    x = 622,079,710,823.69/905,639.12
  6. Step 6: Final answer
    x = 686,895.80

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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.