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Finding the Fourth Proportional to 646,993,208.40, 970,489,812.60 and 402,105,195.60

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Solution

The fourth proportional to 646,993,208.40, 970,489,812.60 and 402,105,195.60 is: 603,157,793.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,993,208.40 : 970,489,812.60 = 402,105,195.60 : x
  2. Step 2: Convert to fraction form
    646,993,208.40/970,489,812.60 = 402,105,195.60/x
  3. Step 3: Cross multiply
    646,993,208.40x = 970,489,812.60 × 402,105,195.60
  4. Step 4: Simplify right side
    646,993,208.40x = 390,238,995,923,330,368
  5. Step 5: Solve for x
    x = 390,238,995,923,330,368/646,993,208.40
  6. Step 6: Final answer
    x = 603,157,793.40

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Similar ratio
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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.