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Finding the Fourth Proportional to 393,080.08, 542,282.40 and 256,877.64

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Solution

The fourth proportional to 393,080.08, 542,282.40 and 256,877.64 is: 354,381.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,080.08 : 542,282.40 = 256,877.64 : x
  2. Step 2: Convert to fraction form
    393,080.08/542,282.40 = 256,877.64/x
  3. Step 3: Cross multiply
    393,080.08x = 542,282.40 × 256,877.64
  4. Step 4: Simplify right side
    393,080.08x = 139,300,223,125.54
  5. Step 5: Solve for x
    x = 139,300,223,125.54/393,080.08
  6. Step 6: Final answer
    x = 354,381.28

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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.