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Finding the Fourth Proportional to 660,862.40, 991,293.60 and 626,745.20

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Solution

The fourth proportional to 660,862.40, 991,293.60 and 626,745.20 is: 940,117.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,862.40 : 991,293.60 = 626,745.20 : x
  2. Step 2: Convert to fraction form
    660,862.40/991,293.60 = 626,745.20/x
  3. Step 3: Cross multiply
    660,862.40x = 991,293.60 × 626,745.20
  4. Step 4: Simplify right side
    660,862.40x = 621,288,505,590.72
  5. Step 5: Solve for x
    x = 621,288,505,590.72/660,862.40
  6. Step 6: Final answer
    x = 940,117.80

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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.