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Finding the Fourth Proportional to 390,060.84, 538,294.58 and 220,320.20

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Solution

The fourth proportional to 390,060.84, 538,294.58 and 220,320.20 is: 304,047.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,060.84 : 538,294.58 = 220,320.20 : x
  2. Step 2: Convert to fraction form
    390,060.84/538,294.58 = 220,320.20/x
  3. Step 3: Cross multiply
    390,060.84x = 538,294.58 × 220,320.20
  4. Step 4: Simplify right side
    390,060.84x = 118,597,169,524.52
  5. Step 5: Solve for x
    x = 118,597,169,524.52/390,060.84
  6. Step 6: Final answer
    x = 304,047.88

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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.