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Finding the Fourth Proportional to 438,035.15, 604,617.79 and 256,786.31

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Solution

The fourth proportional to 438,035.15, 604,617.79 and 256,786.31 is: 354,440.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,035.15 : 604,617.79 = 256,786.31 : x
  2. Step 2: Convert to fraction form
    438,035.15/604,617.79 = 256,786.31/x
  3. Step 3: Cross multiply
    438,035.15x = 604,617.79 × 256,786.31
  4. Step 4: Simplify right side
    438,035.15x = 155,257,571,075.73
  5. Step 5: Solve for x
    x = 155,257,571,075.73/438,035.15
  6. Step 6: Final answer
    x = 354,440.89

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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.