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Finding the Fourth Proportional to 679,700.84, 937,985.81 and 389,406.42

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Solution

The fourth proportional to 679,700.84, 937,985.81 and 389,406.42 is: 537,380.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,700.84 : 937,985.81 = 389,406.42 : x
  2. Step 2: Convert to fraction form
    679,700.84/937,985.81 = 389,406.42/x
  3. Step 3: Cross multiply
    679,700.84x = 937,985.81 × 389,406.42
  4. Step 4: Simplify right side
    679,700.84x = 365,257,694,335.87
  5. Step 5: Solve for x
    x = 365,257,694,335.87/679,700.84
  6. Step 6: Final answer
    x = 537,380.09

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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.