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Finding the Fourth Proportional to 666,724.68, 920,133.80 and 380,266.56

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Solution

The fourth proportional to 666,724.68, 920,133.80 and 380,266.56 is: 524,798.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,724.68 : 920,133.80 = 380,266.56 : x
  2. Step 2: Convert to fraction form
    666,724.68/920,133.80 = 380,266.56/x
  3. Step 3: Cross multiply
    666,724.68x = 920,133.80 × 380,266.56
  4. Step 4: Simplify right side
    666,724.68x = 349,896,114,865.73
  5. Step 5: Solve for x
    x = 349,896,114,865.73/666,724.68
  6. Step 6: Final answer
    x = 524,798.50

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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.