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Finding the Fourth Proportional to 438,017.13, 604,408.71 and 256,687.56

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Solution

The fourth proportional to 438,017.13, 604,408.71 and 256,687.56 is: 354,196.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,017.13 : 604,408.71 = 256,687.56 : x
  2. Step 2: Convert to fraction form
    438,017.13/604,408.71 = 256,687.56/x
  3. Step 3: Cross multiply
    438,017.13x = 604,408.71 × 256,687.56
  4. Step 4: Simplify right side
    438,017.13x = 155,144,197,012.65
  5. Step 5: Solve for x
    x = 155,144,197,012.65/438,017.13
  6. Step 6: Final answer
    x = 354,196.64

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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.