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Finding the Fourth Proportional to 717,396.12, 990,051.42 and 395,106.14

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Solution

The fourth proportional to 717,396.12, 990,051.42 and 395,106.14 is: 545,271.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,396.12 : 990,051.42 = 395,106.14 : x
  2. Step 2: Convert to fraction form
    717,396.12/990,051.42 = 395,106.14/x
  3. Step 3: Cross multiply
    717,396.12x = 990,051.42 × 395,106.14
  4. Step 4: Simplify right side
    717,396.12x = 391,175,391,489.11
  5. Step 5: Solve for x
    x = 391,175,391,489.11/717,396.12
  6. Step 6: Final answer
    x = 545,271.13

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Double scale
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Similar ratio
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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.