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Finding the Fourth Proportional to 520,298.37, 780,435.39 and 239,815.62

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Solution

The fourth proportional to 520,298.37, 780,435.39 and 239,815.62 is: 359,717.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,298.37 : 780,435.39 = 239,815.62 : x
  2. Step 2: Convert to fraction form
    520,298.37/780,435.39 = 239,815.62/x
  3. Step 3: Cross multiply
    520,298.37x = 780,435.39 × 239,815.62
  4. Step 4: Simplify right side
    520,298.37x = 187,160,596,922.79
  5. Step 5: Solve for x
    x = 187,160,596,922.79/520,298.37
  6. Step 6: Final answer
    x = 359,717.82

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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.