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Finding the Fourth Proportional to 666,849.78, 920,260.04 and 380,386.80

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Solution

The fourth proportional to 666,849.78, 920,260.04 and 380,386.80 is: 524,937.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,849.78 : 920,260.04 = 380,386.80 : x
  2. Step 2: Convert to fraction form
    666,849.78/920,260.04 = 380,386.80/x
  3. Step 3: Cross multiply
    666,849.78x = 920,260.04 × 380,386.80
  4. Step 4: Simplify right side
    666,849.78x = 350,054,769,881.54
  5. Step 5: Solve for x
    x = 350,054,769,881.54/666,849.78
  6. Step 6: Final answer
    x = 524,937.97

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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.