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Finding the Fourth Proportional to 387,715.64, 534,486.72 and 256,673.64

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Solution

The fourth proportional to 387,715.64, 534,486.72 and 256,673.64 is: 353,838.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,715.64 : 534,486.72 = 256,673.64 : x
  2. Step 2: Convert to fraction form
    387,715.64/534,486.72 = 256,673.64/x
  3. Step 3: Cross multiply
    387,715.64x = 534,486.72 × 256,673.64
  4. Step 4: Simplify right side
    387,715.64x = 137,188,651,954.06
  5. Step 5: Solve for x
    x = 137,188,651,954.06/387,715.64
  6. Step 6: Final answer
    x = 353,838.32

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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.