Home / 720,028,677.36-993,639,608.28-390,003,816.72

Finding the Fourth Proportional to 720,028,677.36, 993,639,608.28 and 390,003,816.72

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Solution

The fourth proportional to 720,028,677.36, 993,639,608.28 and 390,003,816.72 is: 538,205,285.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,028,677.36 : 993,639,608.28 = 390,003,816.72 : x
  2. Step 2: Convert to fraction form
    720,028,677.36/993,639,608.28 = 390,003,816.72/x
  3. Step 3: Cross multiply
    720,028,677.36x = 993,639,608.28 × 390,003,816.72
  4. Step 4: Simplify right side
    720,028,677.36x = 387,523,239,673,365,760
  5. Step 5: Solve for x
    x = 387,523,239,673,365,760/720,028,677.36
  6. Step 6: Final answer
    x = 538,205,285.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.