Home / 447,743.80-671,615.70-421,478.20

Finding the Fourth Proportional to 447,743.80, 671,615.70 and 421,478.20

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Solution

The fourth proportional to 447,743.80, 671,615.70 and 421,478.20 is: 632,217.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    447,743.80 : 671,615.70 = 421,478.20 : x
  2. Step 2: Convert to fraction form
    447,743.80/671,615.70 = 421,478.20/x
  3. Step 3: Cross multiply
    447,743.80x = 671,615.70 × 421,478.20
  4. Step 4: Simplify right side
    447,743.80x = 283,071,376,327.74
  5. Step 5: Solve for x
    x = 283,071,376,327.74/447,743.80
  6. Step 6: Final answer
    x = 632,217.30

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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.