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Finding the Fourth Proportional to 390,052.94, 538,233.46 and 220,254.26

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Solution

The fourth proportional to 390,052.94, 538,233.46 and 220,254.26 is: 303,928.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,052.94 : 538,233.46 = 220,254.26 : x
  2. Step 2: Convert to fraction form
    390,052.94/538,233.46 = 220,254.26/x
  3. Step 3: Cross multiply
    390,052.94x = 538,233.46 × 220,254.26
  4. Step 4: Simplify right side
    390,052.94x = 118,548,209,197.74
  5. Step 5: Solve for x
    x = 118,548,209,197.74/390,052.94
  6. Step 6: Final answer
    x = 303,928.51

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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.