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Finding the Fourth Proportional to 620,571,686.80, 930,857,530.20 and 275,158,656.40

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Solution

The fourth proportional to 620,571,686.80, 930,857,530.20 and 275,158,656.40 is: 412,737,984.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,571,686.80 : 930,857,530.20 = 275,158,656.40 : x
  2. Step 2: Convert to fraction form
    620,571,686.80/930,857,530.20 = 275,158,656.40/x
  3. Step 3: Cross multiply
    620,571,686.80x = 930,857,530.20 × 275,158,656.40
  4. Step 4: Simplify right side
    620,571,686.80x = 256,133,507,309,654,400
  5. Step 5: Solve for x
    x = 256,133,507,309,654,400/620,571,686.80
  6. Step 6: Final answer
    x = 412,737,984.60

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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.