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Finding the Fourth Proportional to 519,374.70, 779,062.05 and 407,400.30

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Solution

The fourth proportional to 519,374.70, 779,062.05 and 407,400.30 is: 611,100.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,374.70 : 779,062.05 = 407,400.30 : x
  2. Step 2: Convert to fraction form
    519,374.70/779,062.05 = 407,400.30/x
  3. Step 3: Cross multiply
    519,374.70x = 779,062.05 × 407,400.30
  4. Step 4: Simplify right side
    519,374.70x = 317,390,112,888.62
  5. Step 5: Solve for x
    x = 317,390,112,888.62/519,374.70
  6. Step 6: Final answer
    x = 611,100.45

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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.