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Finding the Fourth Proportional to 519,718.80, 779,869.80 and 220,148.40

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Solution

The fourth proportional to 519,718.80, 779,869.80 and 220,148.40 is: 330,346.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,718.80 : 779,869.80 = 220,148.40 : x
  2. Step 2: Convert to fraction form
    519,718.80/779,869.80 = 220,148.40/x
  3. Step 3: Cross multiply
    519,718.80x = 779,869.80 × 220,148.40
  4. Step 4: Simplify right side
    519,718.80x = 171,687,088,678.32
  5. Step 5: Solve for x
    x = 171,687,088,678.32/519,718.80
  6. Step 6: Final answer
    x = 330,346.12

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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.