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Finding the Fourth Proportional to 666,938.07, 920,288.82 and 380,441.07

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Solution

The fourth proportional to 666,938.07, 920,288.82 and 380,441.07 is: 524,959.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,938.07 : 920,288.82 = 380,441.07 : x
  2. Step 2: Convert to fraction form
    666,938.07/920,288.82 = 380,441.07/x
  3. Step 3: Cross multiply
    666,938.07x = 920,288.82 × 380,441.07
  4. Step 4: Simplify right side
    666,938.07x = 350,115,663,389.84
  5. Step 5: Solve for x
    x = 350,115,663,389.84/666,938.07
  6. Step 6: Final answer
    x = 524,959.78

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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.