Home / 717,697,989-990,423,623.70-387,673,131.24

Finding the Fourth Proportional to 717,697,989, 990,423,623.70 and 387,673,131.24

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Solution

The fourth proportional to 717,697,989, 990,423,623.70 and 387,673,131.24 is: 534,989,136.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,697,989 : 990,423,623.70 = 387,673,131.24 : x
  2. Step 2: Convert to fraction form
    717,697,989/990,423,623.70 = 387,673,131.24/x
  3. Step 3: Cross multiply
    717,697,989x = 990,423,623.70 × 387,673,131.24
  4. Step 4: Simplify right side
    717,697,989x = 383,960,627,453,846,528
  5. Step 5: Solve for x
    x = 383,960,627,453,846,528/717,697,989
  6. Step 6: Final answer
    x = 534,989,136.57

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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.