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Finding the Fourth Proportional to 561,279.65, 774,601.61 and 319,583.34

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Solution

The fourth proportional to 561,279.65, 774,601.61 and 319,583.34 is: 441,045.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,279.65 : 774,601.61 = 319,583.34 : x
  2. Step 2: Convert to fraction form
    561,279.65/774,601.61 = 319,583.34/x
  3. Step 3: Cross multiply
    561,279.65x = 774,601.61 × 319,583.34
  4. Step 4: Simplify right side
    561,279.65x = 247,549,768,095.26
  5. Step 5: Solve for x
    x = 247,549,768,095.26/561,279.65
  6. Step 6: Final answer
    x = 441,045.33

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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.