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Finding the Fourth Proportional to 644,196.72, 888,994.26 and 357,715.92

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Solution

The fourth proportional to 644,196.72, 888,994.26 and 357,715.92 is: 493,649.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,196.72 : 888,994.26 = 357,715.92 : x
  2. Step 2: Convert to fraction form
    644,196.72/888,994.26 = 357,715.92/x
  3. Step 3: Cross multiply
    644,196.72x = 888,994.26 × 357,715.92
  4. Step 4: Simplify right side
    644,196.72x = 318,007,399,590.62
  5. Step 5: Solve for x
    x = 318,007,399,590.62/644,196.72
  6. Step 6: Final answer
    x = 493,649.52

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1.5x scale

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.