Home / 428,931.95-643,390.64-162,686.57

Finding the Fourth Proportional to 428,931.95, 643,390.64 and 162,686.57

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Solution

The fourth proportional to 428,931.95, 643,390.64 and 162,686.57 is: 244,027.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,931.95 : 643,390.64 = 162,686.57 : x
  2. Step 2: Convert to fraction form
    428,931.95/643,390.64 = 162,686.57/x
  3. Step 3: Cross multiply
    428,931.95x = 643,390.64 × 162,686.57
  4. Step 4: Simplify right side
    428,931.95x = 104,671,015,578.27
  5. Step 5: Solve for x
    x = 104,671,015,578.27/428,931.95
  6. Step 6: Final answer
    x = 244,027.09

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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.