Home / 815,638.80-1,223,458.20-478,840.80

Finding the Fourth Proportional to 815,638.80, 1,223,458.20 and 478,840.80

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Solution

The fourth proportional to 815,638.80, 1,223,458.20 and 478,840.80 is: 718,261.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,638.80 : 1,223,458.20 = 478,840.80 : x
  2. Step 2: Convert to fraction form
    815,638.80/1,223,458.20 = 478,840.80/x
  3. Step 3: Cross multiply
    815,638.80x = 1,223,458.20 × 478,840.80
  4. Step 4: Simplify right side
    815,638.80x = 585,841,703,254.56
  5. Step 5: Solve for x
    x = 585,841,703,254.56/815,638.80
  6. Step 6: Final answer
    x = 718,261.20

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Double scale
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1.5x scale

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.