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Finding the Fourth Proportional to 447,730.80, 671,596.20 and 421,465.20

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Solution

The fourth proportional to 447,730.80, 671,596.20 and 421,465.20 is: 632,197.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    447,730.80 : 671,596.20 = 421,465.20 : x
  2. Step 2: Convert to fraction form
    447,730.80/671,596.20 = 421,465.20/x
  3. Step 3: Cross multiply
    447,730.80x = 671,596.20 × 421,465.20
  4. Step 4: Simplify right side
    447,730.80x = 283,054,426,752.24
  5. Step 5: Solve for x
    x = 283,054,426,752.24/447,730.80
  6. Step 6: Final answer
    x = 632,197.80

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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.