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Finding the Fourth Proportional to 387,390, 534,627.36 and 236,516.16

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Solution

The fourth proportional to 387,390, 534,627.36 and 236,516.16 is: 326,410.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,390 : 534,627.36 = 236,516.16 : x
  2. Step 2: Convert to fraction form
    387,390/534,627.36 = 236,516.16/x
  3. Step 3: Cross multiply
    387,390x = 534,627.36 × 236,516.16
  4. Step 4: Simplify right side
    387,390x = 126,448,010,218.14
  5. Step 5: Solve for x
    x = 126,448,010,218.14/387,390
  6. Step 6: Final answer
    x = 326,410.10

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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.