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Finding the Fourth Proportional to 428,430.40, 642,645.60 and 360,001.60

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Solution

The fourth proportional to 428,430.40, 642,645.60 and 360,001.60 is: 540,002.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,430.40 : 642,645.60 = 360,001.60 : x
  2. Step 2: Convert to fraction form
    428,430.40/642,645.60 = 360,001.60/x
  3. Step 3: Cross multiply
    428,430.40x = 642,645.60 × 360,001.60
  4. Step 4: Simplify right side
    428,430.40x = 231,353,444,232.96
  5. Step 5: Solve for x
    x = 231,353,444,232.96/428,430.40
  6. Step 6: Final answer
    x = 540,002.40

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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.