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Finding the Fourth Proportional to 390,050.68, 538,266.18 and 220,281.16

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Solution

The fourth proportional to 390,050.68, 538,266.18 and 220,281.16 is: 303,985.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,050.68 : 538,266.18 = 220,281.16 : x
  2. Step 2: Convert to fraction form
    390,050.68/538,266.18 = 220,281.16/x
  3. Step 3: Cross multiply
    390,050.68x = 538,266.18 × 220,281.16
  4. Step 4: Simplify right side
    390,050.68x = 118,569,898,519.17
  5. Step 5: Solve for x
    x = 118,569,898,519.17/390,050.68
  6. Step 6: Final answer
    x = 303,985.88

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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.