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Finding the Fourth Proportional to 620,783.90, 930,979.02 and 265,702.58

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Solution

The fourth proportional to 620,783.90, 930,979.02 and 265,702.58 is: 398,469.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,783.90 : 930,979.02 = 265,702.58 : x
  2. Step 2: Convert to fraction form
    620,783.90/930,979.02 = 265,702.58/x
  3. Step 3: Cross multiply
    620,783.90x = 930,979.02 × 265,702.58
  4. Step 4: Simplify right side
    620,783.90x = 247,363,525,877.96
  5. Step 5: Solve for x
    x = 247,363,525,877.96/620,783.90
  6. Step 6: Final answer
    x = 398,469.62

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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.