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Finding the Fourth Proportional to 717,908.64, 990,720.42 and 395,630.28

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Solution

The fourth proportional to 717,908.64, 990,720.42 and 395,630.28 is: 545,973.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,908.64 : 990,720.42 = 395,630.28 : x
  2. Step 2: Convert to fraction form
    717,908.64/990,720.42 = 395,630.28/x
  3. Step 3: Cross multiply
    717,908.64x = 990,720.42 × 395,630.28
  4. Step 4: Simplify right side
    717,908.64x = 391,958,997,166.32
  5. Step 5: Solve for x
    x = 391,958,997,166.32/717,908.64
  6. Step 6: Final answer
    x = 545,973.37

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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.