Home / 687,289,190.17-948,490,314.77-405,043,543.21

Finding the Fourth Proportional to 687,289,190.17, 948,490,314.77 and 405,043,543.21

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Solution

The fourth proportional to 687,289,190.17, 948,490,314.77 and 405,043,543.21 is: 558,978,495.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,289,190.17 : 948,490,314.77 = 405,043,543.21 : x
  2. Step 2: Convert to fraction form
    687,289,190.17/948,490,314.77 = 405,043,543.21/x
  3. Step 3: Cross multiply
    687,289,190.17x = 948,490,314.77 × 405,043,543.21
  4. Step 4: Simplify right side
    687,289,190.17x = 384,179,877,794,808,960
  5. Step 5: Solve for x
    x = 384,179,877,794,808,960/687,289,190.17
  6. Step 6: Final answer
    x = 558,978,495.94

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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.