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Finding the Fourth Proportional to 644,353.39, 889,207.65 and 357,900.13

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Solution

The fourth proportional to 644,353.39, 889,207.65 and 357,900.13 is: 493,902.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,353.39 : 889,207.65 = 357,900.13 : x
  2. Step 2: Convert to fraction form
    644,353.39/889,207.65 = 357,900.13/x
  3. Step 3: Cross multiply
    644,353.39x = 889,207.65 × 357,900.13
  4. Step 4: Simplify right side
    644,353.39x = 318,247,533,532.00
  5. Step 5: Solve for x
    x = 318,247,533,532.00/644,353.39
  6. Step 6: Final answer
    x = 493,902.16

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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.