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Finding the Fourth Proportional to 626,900.79, 865,133.15 and 354,961.42

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Solution

The fourth proportional to 626,900.79, 865,133.15 and 354,961.42 is: 489,852.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    626,900.79 : 865,133.15 = 354,961.42 : x
  2. Step 2: Convert to fraction form
    626,900.79/865,133.15 = 354,961.42/x
  3. Step 3: Cross multiply
    626,900.79x = 865,133.15 × 354,961.42
  4. Step 4: Simplify right side
    626,900.79x = 307,088,887,475.43
  5. Step 5: Solve for x
    x = 307,088,887,475.43/626,900.79
  6. Step 6: Final answer
    x = 489,852.45

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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.