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Finding the Fourth Proportional to 515,990,462.40, 724,427,380.80 and 515,990,462.40

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Solution

The fourth proportional to 515,990,462.40, 724,427,380.80 and 515,990,462.40 is: 724,427,380.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,990,462.40 : 724,427,380.80 = 515,990,462.40 : x
  2. Step 2: Convert to fraction form
    515,990,462.40/724,427,380.80 = 515,990,462.40/x
  3. Step 3: Cross multiply
    515,990,462.40x = 724,427,380.80 × 515,990,462.40
  4. Step 4: Simplify right side
    515,990,462.40x = 373,797,619,194,212,864
  5. Step 5: Solve for x
    x = 373,797,619,194,212,864/515,990,462.40
  6. Step 6: Final answer
    x = 724,427,380.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.