Home / 661,256.17-911,688.82-428,271.55

Finding the Fourth Proportional to 661,256.17, 911,688.82 and 428,271.55

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Solution

The fourth proportional to 661,256.17, 911,688.82 and 428,271.55 is: 590,467.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,256.17 : 911,688.82 = 428,271.55 : x
  2. Step 2: Convert to fraction form
    661,256.17/911,688.82 = 428,271.55/x
  3. Step 3: Cross multiply
    661,256.17x = 911,688.82 × 428,271.55
  4. Step 4: Simplify right side
    661,256.17x = 390,450,380,709.17
  5. Step 5: Solve for x
    x = 390,450,380,709.17/661,256.17
  6. Step 6: Final answer
    x = 590,467.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.