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Finding the Fourth Proportional to 578,828.22, 798,789 and 320,713.08

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Solution

The fourth proportional to 578,828.22, 798,789 and 320,713.08 is: 442,587.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,828.22 : 798,789 = 320,713.08 : x
  2. Step 2: Convert to fraction form
    578,828.22/798,789 = 320,713.08/x
  3. Step 3: Cross multiply
    578,828.22x = 798,789 × 320,713.08
  4. Step 4: Simplify right side
    578,828.22x = 256,182,080,460.12
  5. Step 5: Solve for x
    x = 256,182,080,460.12/578,828.22
  6. Step 6: Final answer
    x = 442,587.41

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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.