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Finding the Fourth Proportional to 371,910.30, 513,483.37 and 285,715.76

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Solution

The fourth proportional to 371,910.30, 513,483.37 and 285,715.76 is: 394,477.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,910.30 : 513,483.37 = 285,715.76 : x
  2. Step 2: Convert to fraction form
    371,910.30/513,483.37 = 285,715.76/x
  3. Step 3: Cross multiply
    371,910.30x = 513,483.37 × 285,715.76
  4. Step 4: Simplify right side
    371,910.30x = 146,710,291,306.91
  5. Step 5: Solve for x
    x = 146,710,291,306.91/371,910.30
  6. Step 6: Final answer
    x = 394,477.62

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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.