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Finding the Fourth Proportional to 557,415, 836,261.38 and 163,431

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Solution

The fourth proportional to 557,415, 836,261.38 and 163,431 is: 245,187.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,415 : 836,261.38 = 163,431 : x
  2. Step 2: Convert to fraction form
    557,415/836,261.38 = 163,431/x
  3. Step 3: Cross multiply
    557,415x = 836,261.38 × 163,431
  4. Step 4: Simplify right side
    557,415x = 136,671,033,594.78
  5. Step 5: Solve for x
    x = 136,671,033,594.78/557,415
  6. Step 6: Final answer
    x = 245,187.22

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.