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Finding the Fourth Proportional to 717,813.93, 990,627.34 and 395,523.94

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Solution

The fourth proportional to 717,813.93, 990,627.34 and 395,523.94 is: 545,847.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,813.93 : 990,627.34 = 395,523.94 : x
  2. Step 2: Convert to fraction form
    717,813.93/990,627.34 = 395,523.94/x
  3. Step 3: Cross multiply
    717,813.93x = 990,627.34 × 395,523.94
  4. Step 4: Simplify right side
    717,813.93x = 391,816,828,588.52
  5. Step 5: Solve for x
    x = 391,816,828,588.52/717,813.93
  6. Step 6: Final answer
    x = 545,847.35

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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.