Home / 428,862.90-643,130.10-144,477.03

Finding the Fourth Proportional to 428,862.90, 643,130.10 and 144,477.03

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Solution

The fourth proportional to 428,862.90, 643,130.10 and 144,477.03 is: 216,660.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,862.90 : 643,130.10 = 144,477.03 : x
  2. Step 2: Convert to fraction form
    428,862.90/643,130.10 = 144,477.03/x
  3. Step 3: Cross multiply
    428,862.90x = 643,130.10 × 144,477.03
  4. Step 4: Simplify right side
    428,862.90x = 92,917,526,751.60
  5. Step 5: Solve for x
    x = 92,917,526,751.60/428,862.90
  6. Step 6: Final answer
    x = 216,660.21

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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.