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Finding the Fourth Proportional to 666,769.74, 920,135.07 and 360,839.40

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Solution

The fourth proportional to 666,769.74, 920,135.07 and 360,839.40 is: 497,954.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,769.74 : 920,135.07 = 360,839.40 : x
  2. Step 2: Convert to fraction form
    666,769.74/920,135.07 = 360,839.40/x
  3. Step 3: Cross multiply
    666,769.74x = 920,135.07 × 360,839.40
  4. Step 4: Simplify right side
    666,769.74x = 332,020,986,577.76
  5. Step 5: Solve for x
    x = 332,020,986,577.76/666,769.74
  6. Step 6: Final answer
    x = 497,954.49

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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.