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Finding the Fourth Proportional to 438,440.40, 657,660.60 and 349,866.90

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Solution

The fourth proportional to 438,440.40, 657,660.60 and 349,866.90 is: 524,800.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,440.40 : 657,660.60 = 349,866.90 : x
  2. Step 2: Convert to fraction form
    438,440.40/657,660.60 = 349,866.90/x
  3. Step 3: Cross multiply
    438,440.40x = 657,660.60 × 349,866.90
  4. Step 4: Simplify right side
    438,440.40x = 230,093,675,374.14
  5. Step 5: Solve for x
    x = 230,093,675,374.14/438,440.40
  6. Step 6: Final answer
    x = 524,800.35

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Double scale
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Similar ratio
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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.