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Finding the Fourth Proportional to 717,857.81, 990,597.15 and 395,567.91

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Solution

The fourth proportional to 717,857.81, 990,597.15 and 395,567.91 is: 545,858.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,857.81 : 990,597.15 = 395,567.91 : x
  2. Step 2: Convert to fraction form
    717,857.81/990,597.15 = 395,567.91/x
  3. Step 3: Cross multiply
    717,857.81x = 990,597.15 × 395,567.91
  4. Step 4: Simplify right side
    717,857.81x = 391,848,444,277.46
  5. Step 5: Solve for x
    x = 391,848,444,277.46/717,857.81
  6. Step 6: Final answer
    x = 545,858.02

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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.