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Finding the Fourth Proportional to 492,503.80, 679,760.91 and 311,100.34

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Solution

The fourth proportional to 492,503.80, 679,760.91 and 311,100.34 is: 429,385.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,503.80 : 679,760.91 = 311,100.34 : x
  2. Step 2: Convert to fraction form
    492,503.80/679,760.91 = 311,100.34/x
  3. Step 3: Cross multiply
    492,503.80x = 679,760.91 × 311,100.34
  4. Step 4: Simplify right side
    492,503.80x = 211,473,850,219.71
  5. Step 5: Solve for x
    x = 211,473,850,219.71/492,503.80
  6. Step 6: Final answer
    x = 429,385.22

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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.