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Finding the Fourth Proportional to 438,088.40, 657,132.60 and 105,664.40

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Solution

The fourth proportional to 438,088.40, 657,132.60 and 105,664.40 is: 158,496.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,088.40 : 657,132.60 = 105,664.40 : x
  2. Step 2: Convert to fraction form
    438,088.40/657,132.60 = 105,664.40/x
  3. Step 3: Cross multiply
    438,088.40x = 657,132.60 × 105,664.40
  4. Step 4: Simplify right side
    438,088.40x = 69,435,521,899.44
  5. Step 5: Solve for x
    x = 69,435,521,899.44/438,088.40
  6. Step 6: Final answer
    x = 158,496.60

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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.