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Finding the Fourth Proportional to 717,462.55, 990,105.02 and 395,173.81

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Solution

The fourth proportional to 717,462.55, 990,105.02 and 395,173.81 is: 545,343.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,462.55 : 990,105.02 = 395,173.81 : x
  2. Step 2: Convert to fraction form
    717,462.55/990,105.02 = 395,173.81/x
  3. Step 3: Cross multiply
    717,462.55x = 990,105.02 × 395,173.81
  4. Step 4: Simplify right side
    717,462.55x = 391,263,573,053.53
  5. Step 5: Solve for x
    x = 391,263,573,053.53/717,462.55
  6. Step 6: Final answer
    x = 545,343.55

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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.