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Finding the Fourth Proportional to 288,769.64, 431,039.38 and 254,681.60

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Solution

The fourth proportional to 288,769.64, 431,039.38 and 254,681.60 is: 380,157.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,769.64 : 431,039.38 = 254,681.60 : x
  2. Step 2: Convert to fraction form
    288,769.64/431,039.38 = 254,681.60/x
  3. Step 3: Cross multiply
    288,769.64x = 431,039.38 × 254,681.60
  4. Step 4: Simplify right side
    288,769.64x = 109,777,798,961.41
  5. Step 5: Solve for x
    x = 109,777,798,961.41/288,769.64
  6. Step 6: Final answer
    x = 380,157.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.