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Finding the Fourth Proportional to 520,039.05, 778,892.17 and 426,727.05

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Solution

The fourth proportional to 520,039.05, 778,892.17 and 426,727.05 is: 639,133.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,039.05 : 778,892.17 = 426,727.05 : x
  2. Step 2: Convert to fraction form
    520,039.05/778,892.17 = 426,727.05/x
  3. Step 3: Cross multiply
    520,039.05x = 778,892.17 × 426,727.05
  4. Step 4: Simplify right side
    520,039.05x = 332,374,357,972.20
  5. Step 5: Solve for x
    x = 332,374,357,972.20/520,039.05
  6. Step 6: Final answer
    x = 639,133.46

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1.5x scale

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.