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Finding the Fourth Proportional to 521,976.69, 720,315.58 and 307,130.67

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Solution

The fourth proportional to 521,976.69, 720,315.58 and 307,130.67 is: 423,833.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,976.69 : 720,315.58 = 307,130.67 : x
  2. Step 2: Convert to fraction form
    521,976.69/720,315.58 = 307,130.67/x
  3. Step 3: Cross multiply
    521,976.69x = 720,315.58 × 307,130.67
  4. Step 4: Simplify right side
    521,976.69x = 221,231,006,696.84
  5. Step 5: Solve for x
    x = 221,231,006,696.84/521,976.69
  6. Step 6: Final answer
    x = 423,833.12

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1.5x scale

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.