Home / 647,035,999.20-970,553,998.80-402,147,986.40

Finding the Fourth Proportional to 647,035,999.20, 970,553,998.80 and 402,147,986.40

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Solution

The fourth proportional to 647,035,999.20, 970,553,998.80 and 402,147,986.40 is: 603,221,979.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,035,999.20 : 970,553,998.80 = 402,147,986.40 : x
  2. Step 2: Convert to fraction form
    647,035,999.20/970,553,998.80 = 402,147,986.40/x
  3. Step 3: Cross multiply
    647,035,999.20x = 970,553,998.80 × 402,147,986.40
  4. Step 4: Simplify right side
    647,035,999.20x = 390,306,336,309,888,000
  5. Step 5: Solve for x
    x = 390,306,336,309,888,000/647,035,999.20
  6. Step 6: Final answer
    x = 603,221,979.60

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1.5x scale

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.