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Finding the Fourth Proportional to 717,953.16, 990,796.10 and 395,684

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Solution

The fourth proportional to 717,953.16, 990,796.10 and 395,684 is: 546,055.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,953.16 : 990,796.10 = 395,684 : x
  2. Step 2: Convert to fraction form
    717,953.16/990,796.10 = 395,684/x
  3. Step 3: Cross multiply
    717,953.16x = 990,796.10 × 395,684
  4. Step 4: Simplify right side
    717,953.16x = 392,042,164,032.40
  5. Step 5: Solve for x
    x = 392,042,164,032.40/717,953.16
  6. Step 6: Final answer
    x = 546,055.35

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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.