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Finding the Fourth Proportional to 666,693.51, 920,052.79 and 380,207.44

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Solution

The fourth proportional to 666,693.51, 920,052.79 and 380,207.44 is: 524,695.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,693.51 : 920,052.79 = 380,207.44 : x
  2. Step 2: Convert to fraction form
    666,693.51/920,052.79 = 380,207.44/x
  3. Step 3: Cross multiply
    666,693.51x = 920,052.79 × 380,207.44
  4. Step 4: Simplify right side
    666,693.51x = 349,810,919,272.62
  5. Step 5: Solve for x
    x = 349,810,919,272.62/666,693.51
  6. Step 6: Final answer
    x = 524,695.25

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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.