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Finding the Fourth Proportional to 438,076.60, 657,066.30 and 122,565.40

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Solution

The fourth proportional to 438,076.60, 657,066.30 and 122,565.40 is: 183,834.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,076.60 : 657,066.30 = 122,565.40 : x
  2. Step 2: Convert to fraction form
    438,076.60/657,066.30 = 122,565.40/x
  3. Step 3: Cross multiply
    438,076.60x = 657,066.30 × 122,565.40
  4. Step 4: Simplify right side
    438,076.60x = 80,533,593,886.02
  5. Step 5: Solve for x
    x = 80,533,593,886.02/438,076.60
  6. Step 6: Final answer
    x = 183,834.50

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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.