Home / 717,905.64-990,716.28-395,627.28

Finding the Fourth Proportional to 717,905.64, 990,716.28 and 395,627.28

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Solution

The fourth proportional to 717,905.64, 990,716.28 and 395,627.28 is: 545,969.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,905.64 : 990,716.28 = 395,627.28 : x
  2. Step 2: Convert to fraction form
    717,905.64/990,716.28 = 395,627.28/x
  3. Step 3: Cross multiply
    717,905.64x = 990,716.28 × 395,627.28
  4. Step 4: Simplify right side
    717,905.64x = 391,954,387,108.12
  5. Step 5: Solve for x
    x = 391,954,387,108.12/717,905.64
  6. Step 6: Final answer
    x = 545,969.23

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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.