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Finding the Fourth Proportional to 521,909.30, 720,222.58 and 307,063.20

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Solution

The fourth proportional to 521,909.30, 720,222.58 and 307,063.20 is: 423,740.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,909.30 : 720,222.58 = 307,063.20 : x
  2. Step 2: Convert to fraction form
    521,909.30/720,222.58 = 307,063.20/x
  3. Step 3: Cross multiply
    521,909.30x = 720,222.58 × 307,063.20
  4. Step 4: Simplify right side
    521,909.30x = 221,153,850,127.06
  5. Step 5: Solve for x
    x = 221,153,850,127.06/521,909.30
  6. Step 6: Final answer
    x = 423,740.01

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.