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Finding the Fourth Proportional to 315,510.88, 435,865.64 and 272,995.60

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Solution

The fourth proportional to 315,510.88, 435,865.64 and 272,995.60 is: 377,132.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,510.88 : 435,865.64 = 272,995.60 : x
  2. Step 2: Convert to fraction form
    315,510.88/435,865.64 = 272,995.60/x
  3. Step 3: Cross multiply
    315,510.88x = 435,865.64 × 272,995.60
  4. Step 4: Simplify right side
    315,510.88x = 118,989,401,911.18
  5. Step 5: Solve for x
    x = 118,989,401,911.18/315,510.88
  6. Step 6: Final answer
    x = 377,132.48

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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.