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Finding the Fourth Proportional to 390,016.04, 538,222.16 and 220,261.08

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Solution

The fourth proportional to 390,016.04, 538,222.16 and 220,261.08 is: 303,960.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,016.04 : 538,222.16 = 220,261.08 : x
  2. Step 2: Convert to fraction form
    390,016.04/538,222.16 = 220,261.08/x
  3. Step 3: Cross multiply
    390,016.04x = 538,222.16 × 220,261.08
  4. Step 4: Simplify right side
    390,016.04x = 118,549,394,241.53
  5. Step 5: Solve for x
    x = 118,549,394,241.53/390,016.04
  6. Step 6: Final answer
    x = 303,960.30

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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.