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Finding the Fourth Proportional to 678,376.64, 936,158.88 and 376,569.92

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Solution

The fourth proportional to 678,376.64, 936,158.88 and 376,569.92 is: 519,666.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,376.64 : 936,158.88 = 376,569.92 : x
  2. Step 2: Convert to fraction form
    678,376.64/936,158.88 = 376,569.92/x
  3. Step 3: Cross multiply
    678,376.64x = 936,158.88 × 376,569.92
  4. Step 4: Simplify right side
    678,376.64x = 352,529,274,548.89
  5. Step 5: Solve for x
    x = 352,529,274,548.89/678,376.64
  6. Step 6: Final answer
    x = 519,666.00

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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.