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Finding the Fourth Proportional to 448,078.30, 672,117.45 and 421,812.70

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Solution

The fourth proportional to 448,078.30, 672,117.45 and 421,812.70 is: 632,719.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    448,078.30 : 672,117.45 = 421,812.70 : x
  2. Step 2: Convert to fraction form
    448,078.30/672,117.45 = 421,812.70/x
  3. Step 3: Cross multiply
    448,078.30x = 672,117.45 × 421,812.70
  4. Step 4: Simplify right side
    448,078.30x = 283,507,676,301.62
  5. Step 5: Solve for x
    x = 283,507,676,301.62/448,078.30
  6. Step 6: Final answer
    x = 632,719.05

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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.