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Finding the Fourth Proportional to 431,328.30, 646,992.45 and 431,328.30

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Solution

The fourth proportional to 431,328.30, 646,992.45 and 431,328.30 is: 646,992.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,328.30 : 646,992.45 = 431,328.30 : x
  2. Step 2: Convert to fraction form
    431,328.30/646,992.45 = 431,328.30/x
  3. Step 3: Cross multiply
    431,328.30x = 646,992.45 × 431,328.30
  4. Step 4: Simplify right side
    431,328.30x = 279,066,153,571.34
  5. Step 5: Solve for x
    x = 279,066,153,571.34/431,328.30
  6. Step 6: Final answer
    x = 646,992.45

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.