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Finding the Fourth Proportional to 315,749.88, 435,718.98 and 172,483.56

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Solution

The fourth proportional to 315,749.88, 435,718.98 and 172,483.56 is: 238,018.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,749.88 : 435,718.98 = 172,483.56 : x
  2. Step 2: Convert to fraction form
    315,749.88/435,718.98 = 172,483.56/x
  3. Step 3: Cross multiply
    315,749.88x = 435,718.98 × 172,483.56
  4. Step 4: Simplify right side
    315,749.88x = 75,154,360,829.97
  5. Step 5: Solve for x
    x = 75,154,360,829.97/315,749.88
  6. Step 6: Final answer
    x = 238,018.65

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1.5x scale

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.