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Finding the Fourth Proportional to 620,082,992.40, 930,124,488.60 and 310,146,601.20

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Solution

The fourth proportional to 620,082,992.40, 930,124,488.60 and 310,146,601.20 is: 465,219,901.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,082,992.40 : 930,124,488.60 = 310,146,601.20 : x
  2. Step 2: Convert to fraction form
    620,082,992.40/930,124,488.60 = 310,146,601.20/x
  3. Step 3: Cross multiply
    620,082,992.40x = 930,124,488.60 × 310,146,601.20
  4. Step 4: Simplify right side
    620,082,992.40x = 288,474,948,832,178,112
  5. Step 5: Solve for x
    x = 288,474,948,832,178,112/620,082,992.40
  6. Step 6: Final answer
    x = 465,219,901.80

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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.