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Finding the Fourth Proportional to 387,775.34, 535,064.45 and 215,670.68

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Solution

The fourth proportional to 387,775.34, 535,064.45 and 215,670.68 is: 297,589.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,775.34 : 535,064.45 = 215,670.68 : x
  2. Step 2: Convert to fraction form
    387,775.34/535,064.45 = 215,670.68/x
  3. Step 3: Cross multiply
    387,775.34x = 535,064.45 × 215,670.68
  4. Step 4: Simplify right side
    387,775.34x = 115,397,713,775.33
  5. Step 5: Solve for x
    x = 115,397,713,775.33/387,775.34
  6. Step 6: Final answer
    x = 297,589.10

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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.