Home / 716,642,820.40-988,904,014.04-399,079,069.87

Finding the Fourth Proportional to 716,642,820.40, 988,904,014.04 and 399,079,069.87

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Solution

The fourth proportional to 716,642,820.40, 988,904,014.04 and 399,079,069.87 is: 550,693,989.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,642,820.40 : 988,904,014.04 = 399,079,069.87 : x
  2. Step 2: Convert to fraction form
    716,642,820.40/988,904,014.04 = 399,079,069.87/x
  3. Step 3: Cross multiply
    716,642,820.40x = 988,904,014.04 × 399,079,069.87
  4. Step 4: Simplify right side
    716,642,820.40x = 394,650,894,106,852,672
  5. Step 5: Solve for x
    x = 394,650,894,106,852,672/716,642,820.40
  6. Step 6: Final answer
    x = 550,693,989.91

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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.