Home / 438,020.40-657,030.60-280,556.40

Finding the Fourth Proportional to 438,020.40, 657,030.60 and 280,556.40

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Solution

The fourth proportional to 438,020.40, 657,030.60 and 280,556.40 is: 420,834.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,020.40 : 657,030.60 = 280,556.40 : x
  2. Step 2: Convert to fraction form
    438,020.40/657,030.60 = 280,556.40/x
  3. Step 3: Cross multiply
    438,020.40x = 657,030.60 × 280,556.40
  4. Step 4: Simplify right side
    438,020.40x = 184,334,139,825.84
  5. Step 5: Solve for x
    x = 184,334,139,825.84/438,020.40
  6. Step 6: Final answer
    x = 420,834.60

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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.