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Finding the Fourth Proportional to 415,055.60, 622,583.40 and 412,431.20

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Solution

The fourth proportional to 415,055.60, 622,583.40 and 412,431.20 is: 618,646.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,055.60 : 622,583.40 = 412,431.20 : x
  2. Step 2: Convert to fraction form
    415,055.60/622,583.40 = 412,431.20/x
  3. Step 3: Cross multiply
    415,055.60x = 622,583.40 × 412,431.20
  4. Step 4: Simplify right side
    415,055.60x = 256,772,818,762.08
  5. Step 5: Solve for x
    x = 256,772,818,762.08/415,055.60
  6. Step 6: Final answer
    x = 618,646.80

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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.