Home / 716,642,819.15-988,904,012.31-399,079,068.62

Finding the Fourth Proportional to 716,642,819.15, 988,904,012.31 and 399,079,068.62

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Solution

The fourth proportional to 716,642,819.15, 988,904,012.31 and 399,079,068.62 is: 550,693,988.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,642,819.15 : 988,904,012.31 = 399,079,068.62 : x
  2. Step 2: Convert to fraction form
    716,642,819.15/988,904,012.31 = 399,079,068.62/x
  3. Step 3: Cross multiply
    716,642,819.15x = 988,904,012.31 × 399,079,068.62
  4. Step 4: Simplify right side
    716,642,819.15x = 394,650,892,182,311,296
  5. Step 5: Solve for x
    x = 394,650,892,182,311,296/716,642,819.15
  6. Step 6: Final answer
    x = 550,693,988.19

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1.5x scale

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.