Home / 428,543.20-642,814.80-359,077.60

Finding the Fourth Proportional to 428,543.20, 642,814.80 and 359,077.60

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Solution

The fourth proportional to 428,543.20, 642,814.80 and 359,077.60 is: 538,616.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,543.20 : 642,814.80 = 359,077.60 : x
  2. Step 2: Convert to fraction form
    428,543.20/642,814.80 = 359,077.60/x
  3. Step 3: Cross multiply
    428,543.20x = 642,814.80 × 359,077.60
  4. Step 4: Simplify right side
    428,543.20x = 230,820,395,628.48
  5. Step 5: Solve for x
    x = 230,820,395,628.48/428,543.20
  6. Step 6: Final answer
    x = 538,616.40

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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.