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Finding the Fourth Proportional to 644,399.15, 889,293.13 and 357,945.89

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Solution

The fourth proportional to 644,399.15, 889,293.13 and 357,945.89 is: 493,977.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,399.15 : 889,293.13 = 357,945.89 : x
  2. Step 2: Convert to fraction form
    644,399.15/889,293.13 = 357,945.89/x
  3. Step 3: Cross multiply
    644,399.15x = 889,293.13 × 357,945.89
  4. Step 4: Simplify right side
    644,399.15x = 318,318,815,547.41
  5. Step 5: Solve for x
    x = 318,318,815,547.41/644,399.15
  6. Step 6: Final answer
    x = 493,977.71

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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.