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Finding the Fourth Proportional to 666,945.36, 920,298.11 and 380,448.36

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Solution

The fourth proportional to 666,945.36, 920,298.11 and 380,448.36 is: 524,969.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,945.36 : 920,298.11 = 380,448.36 : x
  2. Step 2: Convert to fraction form
    666,945.36/920,298.11 = 380,448.36/x
  3. Step 3: Cross multiply
    666,945.36x = 920,298.11 × 380,448.36
  4. Step 4: Simplify right side
    666,945.36x = 350,125,904,758.36
  5. Step 5: Solve for x
    x = 350,125,904,758.36/666,945.36
  6. Step 6: Final answer
    x = 524,969.40

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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.