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Finding the Fourth Proportional to 353,143.40, 529,715.10 and 313,485.80

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Solution

The fourth proportional to 353,143.40, 529,715.10 and 313,485.80 is: 470,228.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,143.40 : 529,715.10 = 313,485.80 : x
  2. Step 2: Convert to fraction form
    353,143.40/529,715.10 = 313,485.80/x
  3. Step 3: Cross multiply
    353,143.40x = 529,715.10 × 313,485.80
  4. Step 4: Simplify right side
    353,143.40x = 166,058,161,895.58
  5. Step 5: Solve for x
    x = 166,058,161,895.58/353,143.40
  6. Step 6: Final answer
    x = 470,228.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.