Home / 429,263.16-643,811.71-215,974.02

Finding the Fourth Proportional to 429,263.16, 643,811.71 and 215,974.02

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Solution

The fourth proportional to 429,263.16, 643,811.71 and 215,974.02 is: 323,919.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,263.16 : 643,811.71 = 215,974.02 : x
  2. Step 2: Convert to fraction form
    429,263.16/643,811.71 = 215,974.02/x
  3. Step 3: Cross multiply
    429,263.16x = 643,811.71 × 215,974.02
  4. Step 4: Simplify right side
    429,263.16x = 139,046,605,409.65
  5. Step 5: Solve for x
    x = 139,046,605,409.65/429,263.16
  6. Step 6: Final answer
    x = 323,919.26

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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.