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Finding the Fourth Proportional to 620,783,955.60, 930,840,010.20 and 257,315,053.20

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Solution

The fourth proportional to 620,783,955.60, 930,840,010.20 and 257,315,053.20 is: 385,833,339.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,783,955.60 : 930,840,010.20 = 257,315,053.20 : x
  2. Step 2: Convert to fraction form
    620,783,955.60/930,840,010.20 = 257,315,053.20/x
  3. Step 3: Cross multiply
    620,783,955.60x = 930,840,010.20 × 257,315,053.20
  4. Step 4: Simplify right side
    620,783,955.60x = 239,519,146,745,301,536
  5. Step 5: Solve for x
    x = 239,519,146,745,301,536/620,783,955.60
  6. Step 6: Final answer
    x = 385,833,339.58

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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.