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Finding the Fourth Proportional to 665,700.84, 918,673.56 and 379,216.80

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Solution

The fourth proportional to 665,700.84, 918,673.56 and 379,216.80 is: 523,322.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,700.84 : 918,673.56 = 379,216.80 : x
  2. Step 2: Convert to fraction form
    665,700.84/918,673.56 = 379,216.80/x
  3. Step 3: Cross multiply
    665,700.84x = 918,673.56 × 379,216.80
  4. Step 4: Simplify right side
    665,700.84x = 348,376,447,667.81
  5. Step 5: Solve for x
    x = 348,376,447,667.81/665,700.84
  6. Step 6: Final answer
    x = 523,322.83

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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.