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Finding the Fourth Proportional to 591,279.58, 815,965.66 and 319,347.40

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Solution

The fourth proportional to 591,279.58, 815,965.66 and 319,347.40 is: 440,699.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    591,279.58 : 815,965.66 = 319,347.40 : x
  2. Step 2: Convert to fraction form
    591,279.58/815,965.66 = 319,347.40/x
  3. Step 3: Cross multiply
    591,279.58x = 815,965.66 × 319,347.40
  4. Step 4: Simplify right side
    591,279.58x = 260,576,512,010.28
  5. Step 5: Solve for x
    x = 260,576,512,010.28/591,279.58
  6. Step 6: Final answer
    x = 440,699.33

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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.