Home / 428,913.53-642,921.35-144,505.80

Finding the Fourth Proportional to 428,913.53, 642,921.35 and 144,505.80

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Solution

The fourth proportional to 428,913.53, 642,921.35 and 144,505.80 is: 216,607.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,913.53 : 642,921.35 = 144,505.80 : x
  2. Step 2: Convert to fraction form
    428,913.53/642,921.35 = 144,505.80/x
  3. Step 3: Cross multiply
    428,913.53x = 642,921.35 × 144,505.80
  4. Step 4: Simplify right side
    428,913.53x = 92,905,862,300.93
  5. Step 5: Solve for x
    x = 92,905,862,300.93/428,913.53
  6. Step 6: Final answer
    x = 216,607.44

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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.