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Finding the Fourth Proportional to 521,957.67, 720,267.48 and 307,056.21

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Solution

The fourth proportional to 521,957.67, 720,267.48 and 307,056.21 is: 423,717.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,957.67 : 720,267.48 = 307,056.21 : x
  2. Step 2: Convert to fraction form
    521,957.67/720,267.48 = 307,056.21/x
  3. Step 3: Cross multiply
    521,957.67x = 720,267.48 × 307,056.21
  4. Step 4: Simplify right side
    521,957.67x = 221,162,602,595.05
  5. Step 5: Solve for x
    x = 221,162,602,595.05/521,957.67
  6. Step 6: Final answer
    x = 423,717.51

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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.