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Finding the Fourth Proportional to 391,259.16, 586,888.74 and 213,669.29

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Solution

The fourth proportional to 391,259.16, 586,888.74 and 213,669.29 is: 320,503.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,259.16 : 586,888.74 = 213,669.29 : x
  2. Step 2: Convert to fraction form
    391,259.16/586,888.74 = 213,669.29/x
  3. Step 3: Cross multiply
    391,259.16x = 586,888.74 × 213,669.29
  4. Step 4: Simplify right side
    391,259.16x = 125,400,101,852.02
  5. Step 5: Solve for x
    x = 125,400,101,852.02/391,259.16
  6. Step 6: Final answer
    x = 320,503.94

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.