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Finding the Fourth Proportional to 620,565,460.80, 930,848,191.20 and 275,152,430.40

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Solution

The fourth proportional to 620,565,460.80, 930,848,191.20 and 275,152,430.40 is: 412,728,645.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,565,460.80 : 930,848,191.20 = 275,152,430.40 : x
  2. Step 2: Convert to fraction form
    620,565,460.80/930,848,191.20 = 275,152,430.40/x
  3. Step 3: Cross multiply
    620,565,460.80x = 930,848,191.20 × 275,152,430.40
  4. Step 4: Simplify right side
    620,565,460.80x = 256,125,142,142,123,872
  5. Step 5: Solve for x
    x = 256,125,142,142,123,872/620,565,460.80
  6. Step 6: Final answer
    x = 412,728,645.60

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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.