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Finding the Fourth Proportional to 631,987.32, 872,145.59 and 345,507.42

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Solution

The fourth proportional to 631,987.32, 872,145.59 and 345,507.42 is: 476,801.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,987.32 : 872,145.59 = 345,507.42 : x
  2. Step 2: Convert to fraction form
    631,987.32/872,145.59 = 345,507.42/x
  3. Step 3: Cross multiply
    631,987.32x = 872,145.59 × 345,507.42
  4. Step 4: Simplify right side
    631,987.32x = 301,332,770,937.74
  5. Step 5: Solve for x
    x = 301,332,770,937.74/631,987.32
  6. Step 6: Final answer
    x = 476,801.93

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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.