Home / 513,215,999.20-769,823,998.80-319,346,322.40

Finding the Fourth Proportional to 513,215,999.20, 769,823,998.80 and 319,346,322.40

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Solution

The fourth proportional to 513,215,999.20, 769,823,998.80 and 319,346,322.40 is: 479,019,483.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    513,215,999.20 : 769,823,998.80 = 319,346,322.40 : x
  2. Step 2: Convert to fraction form
    513,215,999.20/769,823,998.80 = 319,346,322.40/x
  3. Step 3: Cross multiply
    513,215,999.20x = 769,823,998.80 × 319,346,322.40
  4. Step 4: Simplify right side
    513,215,999.20x = 245,840,462,912,041,984
  5. Step 5: Solve for x
    x = 245,840,462,912,041,984/513,215,999.20
  6. Step 6: Final answer
    x = 479,019,483.60

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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.