Home / 687,713.80-1,031,570.70-435,771.40

Finding the Fourth Proportional to 687,713.80, 1,031,570.70 and 435,771.40

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Solution

The fourth proportional to 687,713.80, 1,031,570.70 and 435,771.40 is: 653,657.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,713.80 : 1,031,570.70 = 435,771.40 : x
  2. Step 2: Convert to fraction form
    687,713.80/1,031,570.70 = 435,771.40/x
  3. Step 3: Cross multiply
    687,713.80x = 1,031,570.70 × 435,771.40
  4. Step 4: Simplify right side
    687,713.80x = 449,529,008,137.98
  5. Step 5: Solve for x
    x = 449,529,008,137.98/687,713.80
  6. Step 6: Final answer
    x = 653,657.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.