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Finding the Fourth Proportional to 351,143.40, 526,715.10 and 281,159.40

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Solution

The fourth proportional to 351,143.40, 526,715.10 and 281,159.40 is: 421,739.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,143.40 : 526,715.10 = 281,159.40 : x
  2. Step 2: Convert to fraction form
    351,143.40/526,715.10 = 281,159.40/x
  3. Step 3: Cross multiply
    351,143.40x = 526,715.10 × 281,159.40
  4. Step 4: Simplify right side
    351,143.40x = 148,090,901,486.94
  5. Step 5: Solve for x
    x = 148,090,901,486.94/351,143.40
  6. Step 6: Final answer
    x = 421,739.10

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1.5x scale

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.