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Finding the Fourth Proportional to 438,448.40, 657,672.60 and 349,218.80

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Solution

The fourth proportional to 438,448.40, 657,672.60 and 349,218.80 is: 523,828.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,448.40 : 657,672.60 = 349,218.80 : x
  2. Step 2: Convert to fraction form
    438,448.40/657,672.60 = 349,218.80/x
  3. Step 3: Cross multiply
    438,448.40x = 657,672.60 × 349,218.80
  4. Step 4: Simplify right side
    438,448.40x = 229,671,636,164.88
  5. Step 5: Solve for x
    x = 229,671,636,164.88/438,448.40
  6. Step 6: Final answer
    x = 523,828.20

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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.