Home / 717,816.18-990,630.46-395,526.20

Finding the Fourth Proportional to 717,816.18, 990,630.46 and 395,526.20

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Solution

The fourth proportional to 717,816.18, 990,630.46 and 395,526.20 is: 545,850.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,816.18 : 990,630.46 = 395,526.20 : x
  2. Step 2: Convert to fraction form
    717,816.18/990,630.46 = 395,526.20/x
  3. Step 3: Cross multiply
    717,816.18x = 990,630.46 × 395,526.20
  4. Step 4: Simplify right side
    717,816.18x = 391,820,301,448.05
  5. Step 5: Solve for x
    x = 391,820,301,448.05/717,816.18
  6. Step 6: Final answer
    x = 545,850.47

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Double scale
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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.