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Finding the Fourth Proportional to 398,018.76, 549,088.20 and 268,915.56

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Solution

The fourth proportional to 398,018.76, 549,088.20 and 268,915.56 is: 370,983.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,018.76 : 549,088.20 = 268,915.56 : x
  2. Step 2: Convert to fraction form
    398,018.76/549,088.20 = 268,915.56/x
  3. Step 3: Cross multiply
    398,018.76x = 549,088.20 × 268,915.56
  4. Step 4: Simplify right side
    398,018.76x = 147,658,360,792.39
  5. Step 5: Solve for x
    x = 147,658,360,792.39/398,018.76
  6. Step 6: Final answer
    x = 370,983.42

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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.