Home / 717,630,972.72-990,331,409.75-387,606,111.72

Finding the Fourth Proportional to 717,630,972.72, 990,331,409.75 and 387,606,111.72

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Solution

The fourth proportional to 717,630,972.72, 990,331,409.75 and 387,606,111.72 is: 534,896,794.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,630,972.72 : 990,331,409.75 = 387,606,111.72 : x
  2. Step 2: Convert to fraction form
    717,630,972.72/990,331,409.75 = 387,606,111.72/x
  3. Step 3: Cross multiply
    717,630,972.72x = 990,331,409.75 × 387,606,111.72
  4. Step 4: Simplify right side
    717,630,972.72x = 383,858,507,049,493,504
  5. Step 5: Solve for x
    x = 383,858,507,049,493,504/717,630,972.72
  6. Step 6: Final answer
    x = 534,896,794.65

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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.