Home / 815,817.60-1,223,726.40-515,323.80

Finding the Fourth Proportional to 815,817.60, 1,223,726.40 and 515,323.80

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Solution

The fourth proportional to 815,817.60, 1,223,726.40 and 515,323.80 is: 772,985.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,817.60 : 1,223,726.40 = 515,323.80 : x
  2. Step 2: Convert to fraction form
    815,817.60/1,223,726.40 = 515,323.80/x
  3. Step 3: Cross multiply
    815,817.60x = 1,223,726.40 × 515,323.80
  4. Step 4: Simplify right side
    815,817.60x = 630,615,338,608.32
  5. Step 5: Solve for x
    x = 630,615,338,608.32/815,817.60
  6. Step 6: Final answer
    x = 772,985.70

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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.