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Finding the Fourth Proportional to 518,147.48, 715,045.14 and 300,398.60

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Solution

The fourth proportional to 518,147.48, 715,045.14 and 300,398.60 is: 414,551.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,147.48 : 715,045.14 = 300,398.60 : x
  2. Step 2: Convert to fraction form
    518,147.48/715,045.14 = 300,398.60/x
  3. Step 3: Cross multiply
    518,147.48x = 715,045.14 × 300,398.60
  4. Step 4: Simplify right side
    518,147.48x = 214,798,558,992.80
  5. Step 5: Solve for x
    x = 214,798,558,992.80/518,147.48
  6. Step 6: Final answer
    x = 414,551.01

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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.