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Finding the Fourth Proportional to 518,642.96, 715,784.52 and 300,899.60

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Solution

The fourth proportional to 518,642.96, 715,784.52 and 300,899.60 is: 415,274.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,642.96 : 715,784.52 = 300,899.60 : x
  2. Step 2: Convert to fraction form
    518,642.96/715,784.52 = 300,899.60/x
  3. Step 3: Cross multiply
    518,642.96x = 715,784.52 × 300,899.60
  4. Step 4: Simplify right side
    518,642.96x = 215,379,275,754.19
  5. Step 5: Solve for x
    x = 215,379,275,754.19/518,642.96
  6. Step 6: Final answer
    x = 415,274.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.