Home / 394,854,685.16-545,467,052.60-315,365,378.88

Finding the Fourth Proportional to 394,854,685.16, 545,467,052.60 and 315,365,378.88

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Solution

The fourth proportional to 394,854,685.16, 545,467,052.60 and 315,365,378.88 is: 435,657,547.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,854,685.16 : 545,467,052.60 = 315,365,378.88 : x
  2. Step 2: Convert to fraction form
    394,854,685.16/545,467,052.60 = 315,365,378.88/x
  3. Step 3: Cross multiply
    394,854,685.16x = 545,467,052.60 × 315,365,378.88
  4. Step 4: Simplify right side
    394,854,685.16x = 172,021,423,709,755,904
  5. Step 5: Solve for x
    x = 172,021,423,709,755,904/394,854,685.16
  6. Step 6: Final answer
    x = 435,657,547.38

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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.