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Finding the Fourth Proportional to 438,323.70, 657,485.55 and 432,418.80

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Solution

The fourth proportional to 438,323.70, 657,485.55 and 432,418.80 is: 648,628.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,323.70 : 657,485.55 = 432,418.80 : x
  2. Step 2: Convert to fraction form
    438,323.70/657,485.55 = 432,418.80/x
  3. Step 3: Cross multiply
    438,323.70x = 657,485.55 × 432,418.80
  4. Step 4: Simplify right side
    438,323.70x = 284,309,112,548.34
  5. Step 5: Solve for x
    x = 284,309,112,548.34/438,323.70
  6. Step 6: Final answer
    x = 648,628.20

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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.