Home / 688,191.80-1,031,122.91-421,395.21

Finding the Fourth Proportional to 688,191.80, 1,031,122.91 and 421,395.21

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Solution

The fourth proportional to 688,191.80, 1,031,122.91 and 421,395.21 is: 631,379.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    688,191.80 : 1,031,122.91 = 421,395.21 : x
  2. Step 2: Convert to fraction form
    688,191.80/1,031,122.91 = 421,395.21/x
  3. Step 3: Cross multiply
    688,191.80x = 1,031,122.91 × 421,395.21
  4. Step 4: Simplify right side
    688,191.80x = 434,510,256,248.75
  5. Step 5: Solve for x
    x = 434,510,256,248.75/688,191.80
  6. Step 6: Final answer
    x = 631,379.59

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1.5x scale

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.