Home / 860,134.61-1,289,480.21-380,284.94

Finding the Fourth Proportional to 860,134.61, 1,289,480.21 and 380,284.94

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Solution

The fourth proportional to 860,134.61, 1,289,480.21 and 380,284.94 is: 570,108.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    860,134.61 : 1,289,480.21 = 380,284.94 : x
  2. Step 2: Convert to fraction form
    860,134.61/1,289,480.21 = 380,284.94/x
  3. Step 3: Cross multiply
    860,134.61x = 1,289,480.21 × 380,284.94
  4. Step 4: Simplify right side
    860,134.61x = 490,369,902,389.61
  5. Step 5: Solve for x
    x = 490,369,902,389.61/860,134.61
  6. Step 6: Final answer
    x = 570,108.33

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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.