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Finding the Fourth Proportional to 519,347.40, 778,908.78 and 164,390.28

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Solution

The fourth proportional to 519,347.40, 778,908.78 and 164,390.28 is: 246,549.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,347.40 : 778,908.78 = 164,390.28 : x
  2. Step 2: Convert to fraction form
    519,347.40/778,908.78 = 164,390.28/x
  3. Step 3: Cross multiply
    519,347.40x = 778,908.78 × 164,390.28
  4. Step 4: Simplify right side
    519,347.40x = 128,045,032,438.66
  5. Step 5: Solve for x
    x = 128,045,032,438.66/519,347.40
  6. Step 6: Final answer
    x = 246,549.87

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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.