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Finding the Fourth Proportional to 438,122.79, 604,617.21 and 256,965.39

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Solution

The fourth proportional to 438,122.79, 604,617.21 and 256,965.39 is: 354,616.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,122.79 : 604,617.21 = 256,965.39 : x
  2. Step 2: Convert to fraction form
    438,122.79/604,617.21 = 256,965.39/x
  3. Step 3: Cross multiply
    438,122.79x = 604,617.21 × 256,965.39
  4. Step 4: Simplify right side
    438,122.79x = 155,365,697,168.36
  5. Step 5: Solve for x
    x = 155,365,697,168.36/438,122.79
  6. Step 6: Final answer
    x = 354,616.79

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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.