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Finding the Fourth Proportional to 717,388.84, 990,041.34 and 395,098.84

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Solution

The fourth proportional to 717,388.84, 990,041.34 and 395,098.84 is: 545,261.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,388.84 : 990,041.34 = 395,098.84 : x
  2. Step 2: Convert to fraction form
    717,388.84/990,041.34 = 395,098.84/x
  3. Step 3: Cross multiply
    717,388.84x = 990,041.34 × 395,098.84
  4. Step 4: Simplify right side
    717,388.84x = 391,164,184,986.05
  5. Step 5: Solve for x
    x = 391,164,184,986.05/717,388.84
  6. Step 6: Final answer
    x = 545,261.04

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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.