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Finding the Fourth Proportional to 438,134.40, 657,201.60 and 280,670.40

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Solution

The fourth proportional to 438,134.40, 657,201.60 and 280,670.40 is: 421,005.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,134.40 : 657,201.60 = 280,670.40 : x
  2. Step 2: Convert to fraction form
    438,134.40/657,201.60 = 280,670.40/x
  3. Step 3: Cross multiply
    438,134.40x = 657,201.60 × 280,670.40
  4. Step 4: Simplify right side
    438,134.40x = 184,457,035,952.64
  5. Step 5: Solve for x
    x = 184,457,035,952.64/438,134.40
  6. Step 6: Final answer
    x = 421,005.60

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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.