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Finding the Fourth Proportional to 872,401.80, 1,307,630.70 and 339,745.80

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Solution

The fourth proportional to 872,401.80, 1,307,630.70 and 339,745.80 is: 509,240.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    872,401.80 : 1,307,630.70 = 339,745.80 : x
  2. Step 2: Convert to fraction form
    872,401.80/1,307,630.70 = 339,745.80/x
  3. Step 3: Cross multiply
    872,401.80x = 1,307,630.70 × 339,745.80
  4. Step 4: Simplify right side
    872,401.80x = 444,262,038,276.06
  5. Step 5: Solve for x
    x = 444,262,038,276.06/872,401.80
  6. Step 6: Final answer
    x = 509,240.17

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1.5x scale

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.