Home / 761,745.40-1,142,909.70-749,789.80

Finding the Fourth Proportional to 761,745.40, 1,142,909.70 and 749,789.80

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Solution

The fourth proportional to 761,745.40, 1,142,909.70 and 749,789.80 is: 1,124,971.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    761,745.40 : 1,142,909.70 = 749,789.80 : x
  2. Step 2: Convert to fraction form
    761,745.40/1,142,909.70 = 749,789.80/x
  3. Step 3: Cross multiply
    761,745.40x = 1,142,909.70 × 749,789.80
  4. Step 4: Simplify right side
    761,745.40x = 856,942,035,381.06
  5. Step 5: Solve for x
    x = 856,942,035,381.06/761,745.40
  6. Step 6: Final answer
    x = 1,124,971.72

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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.