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Finding the Fourth Proportional to 699,026.52, 964,645.02 and 388,917.12

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Solution

The fourth proportional to 699,026.52, 964,645.02 and 388,917.12 is: 536,699.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    699,026.52 : 964,645.02 = 388,917.12 : x
  2. Step 2: Convert to fraction form
    699,026.52/964,645.02 = 388,917.12/x
  3. Step 3: Cross multiply
    699,026.52x = 964,645.02 × 388,917.12
  4. Step 4: Simplify right side
    699,026.52x = 375,166,963,000.74
  5. Step 5: Solve for x
    x = 375,166,963,000.74/699,026.52
  6. Step 6: Final answer
    x = 536,699.18

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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.