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Finding the Fourth Proportional to 426,030.32, 638,559.55 and 266,179.76

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Solution

The fourth proportional to 426,030.32, 638,559.55 and 266,179.76 is: 398,966.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,030.32 : 638,559.55 = 266,179.76 : x
  2. Step 2: Convert to fraction form
    426,030.32/638,559.55 = 266,179.76/x
  3. Step 3: Cross multiply
    426,030.32x = 638,559.55 × 266,179.76
  4. Step 4: Simplify right side
    426,030.32x = 169,971,623,906.46
  5. Step 5: Solve for x
    x = 169,971,623,906.46/426,030.32
  6. Step 6: Final answer
    x = 398,966.03

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.