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Finding the Fourth Proportional to 661,783.62, 992,581.70 and 212,445.32

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Solution

The fourth proportional to 661,783.62, 992,581.70 and 212,445.32 is: 318,637.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,783.62 : 992,581.70 = 212,445.32 : x
  2. Step 2: Convert to fraction form
    661,783.62/992,581.70 = 212,445.32/x
  3. Step 3: Cross multiply
    661,783.62x = 992,581.70 × 212,445.32
  4. Step 4: Simplify right side
    661,783.62x = 210,869,336,882.64
  5. Step 5: Solve for x
    x = 210,869,336,882.64/661,783.62
  6. Step 6: Final answer
    x = 318,637.89

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.