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Finding the Fourth Proportional to 615,144.96, 849,054.72 and 347,028.48

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Solution

The fourth proportional to 615,144.96, 849,054.72 and 347,028.48 is: 478,986.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,144.96 : 849,054.72 = 347,028.48 : x
  2. Step 2: Convert to fraction form
    615,144.96/849,054.72 = 347,028.48/x
  3. Step 3: Cross multiply
    615,144.96x = 849,054.72 × 347,028.48
  4. Step 4: Simplify right side
    615,144.96x = 294,646,168,918.43
  5. Step 5: Solve for x
    x = 294,646,168,918.43/615,144.96
  6. Step 6: Final answer
    x = 478,986.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.