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Finding the Fourth Proportional to 678,957.36, 936,961.40 and 373,053.28

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Solution

The fourth proportional to 678,957.36, 936,961.40 and 373,053.28 is: 514,813.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,957.36 : 936,961.40 = 373,053.28 : x
  2. Step 2: Convert to fraction form
    678,957.36/936,961.40 = 373,053.28/x
  3. Step 3: Cross multiply
    678,957.36x = 936,961.40 × 373,053.28
  4. Step 4: Simplify right side
    678,957.36x = 349,536,523,503.39
  5. Step 5: Solve for x
    x = 349,536,523,503.39/678,957.36
  6. Step 6: Final answer
    x = 514,813.66

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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.