Home / 860,133.86-1,289,479.08-380,284.19

Finding the Fourth Proportional to 860,133.86, 1,289,479.08 and 380,284.19

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Solution

The fourth proportional to 860,133.86, 1,289,479.08 and 380,284.19 is: 570,107.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    860,133.86 : 1,289,479.08 = 380,284.19 : x
  2. Step 2: Convert to fraction form
    860,133.86/1,289,479.08 = 380,284.19/x
  3. Step 3: Cross multiply
    860,133.86x = 1,289,479.08 × 380,284.19
  4. Step 4: Simplify right side
    860,133.86x = 490,368,507,459.75
  5. Step 5: Solve for x
    x = 490,368,507,459.75/860,133.86
  6. Step 6: Final answer
    x = 570,107.20

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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.