Home / 685,966.87-1,028,950.71-286,389.82

Finding the Fourth Proportional to 685,966.87, 1,028,950.71 and 286,389.82

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Solution

The fourth proportional to 685,966.87, 1,028,950.71 and 286,389.82 is: 429,584.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,966.87 : 1,028,950.71 = 286,389.82 : x
  2. Step 2: Convert to fraction form
    685,966.87/1,028,950.71 = 286,389.82/x
  3. Step 3: Cross multiply
    685,966.87x = 1,028,950.71 × 286,389.82
  4. Step 4: Simplify right side
    685,966.87x = 294,681,008,625.77
  5. Step 5: Solve for x
    x = 294,681,008,625.77/685,966.87
  6. Step 6: Final answer
    x = 429,584.90

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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.