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Finding the Fourth Proportional to 520,291.20, 779,918.40 and 239,318.40

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Solution

The fourth proportional to 520,291.20, 779,918.40 and 239,318.40 is: 358,739.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,291.20 : 779,918.40 = 239,318.40 : x
  2. Step 2: Convert to fraction form
    520,291.20/779,918.40 = 239,318.40/x
  3. Step 3: Cross multiply
    520,291.20x = 779,918.40 × 239,318.40
  4. Step 4: Simplify right side
    520,291.20x = 186,648,823,618.56
  5. Step 5: Solve for x
    x = 186,648,823,618.56/520,291.20
  6. Step 6: Final answer
    x = 358,739.15

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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.