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Finding the Fourth Proportional to 382,637.64, 528,039.54 and 212,868.12

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Solution

The fourth proportional to 382,637.64, 528,039.54 and 212,868.12 is: 293,757.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    382,637.64 : 528,039.54 = 212,868.12 : x
  2. Step 2: Convert to fraction form
    382,637.64/528,039.54 = 212,868.12/x
  3. Step 3: Cross multiply
    382,637.64x = 528,039.54 × 212,868.12
  4. Step 4: Simplify right side
    382,637.64x = 112,402,784,165.47
  5. Step 5: Solve for x
    x = 112,402,784,165.47/382,637.64
  6. Step 6: Final answer
    x = 293,757.78

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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.