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Finding the Fourth Proportional to 679,701.84, 937,987.18 and 389,407.42

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Solution

The fourth proportional to 679,701.84, 937,987.18 and 389,407.42 is: 537,381.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,701.84 : 937,987.18 = 389,407.42 : x
  2. Step 2: Convert to fraction form
    679,701.84/937,987.18 = 389,407.42/x
  3. Step 3: Cross multiply
    679,701.84x = 937,987.18 × 389,407.42
  4. Step 4: Simplify right side
    679,701.84x = 365,259,167,756.88
  5. Step 5: Solve for x
    x = 365,259,167,756.88/679,701.84
  6. Step 6: Final answer
    x = 537,381.46

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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.