Home / 717,697,990-990,423,625.08-387,673,132.24

Finding the Fourth Proportional to 717,697,990, 990,423,625.08 and 387,673,132.24

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Solution

The fourth proportional to 717,697,990, 990,423,625.08 and 387,673,132.24 is: 534,989,137.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,697,990 : 990,423,625.08 = 387,673,132.24 : x
  2. Step 2: Convert to fraction form
    717,697,990/990,423,625.08 = 387,673,132.24/x
  3. Step 3: Cross multiply
    717,697,990x = 990,423,625.08 × 387,673,132.24
  4. Step 4: Simplify right side
    717,697,990x = 383,960,628,979,259,072
  5. Step 5: Solve for x
    x = 383,960,628,979,259,072/717,697,990
  6. Step 6: Final answer
    x = 534,989,137.95

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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.