Home / 438,421.40-657,632.10-412,177.40

Finding the Fourth Proportional to 438,421.40, 657,632.10 and 412,177.40

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Solution

The fourth proportional to 438,421.40, 657,632.10 and 412,177.40 is: 618,266.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,421.40 : 657,632.10 = 412,177.40 : x
  2. Step 2: Convert to fraction form
    438,421.40/657,632.10 = 412,177.40/x
  3. Step 3: Cross multiply
    438,421.40x = 657,632.10 × 412,177.40
  4. Step 4: Simplify right side
    438,421.40x = 271,061,089,134.54
  5. Step 5: Solve for x
    x = 271,061,089,134.54/438,421.40
  6. Step 6: Final answer
    x = 618,266.10

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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.