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Finding the Fourth Proportional to 656,320.50, 905,722.65 and 354,514.50

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Solution

The fourth proportional to 656,320.50, 905,722.65 and 354,514.50 is: 489,230.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,320.50 : 905,722.65 = 354,514.50 : x
  2. Step 2: Convert to fraction form
    656,320.50/905,722.65 = 354,514.50/x
  3. Step 3: Cross multiply
    656,320.50x = 905,722.65 × 354,514.50
  4. Step 4: Simplify right side
    656,320.50x = 321,091,812,403.43
  5. Step 5: Solve for x
    x = 321,091,812,403.43/656,320.50
  6. Step 6: Final answer
    x = 489,230.20

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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.