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Finding the Fourth Proportional to 420,886.40, 580,672.32 and 248,768.32

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Solution

The fourth proportional to 420,886.40, 580,672.32 and 248,768.32 is: 343,211.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,886.40 : 580,672.32 = 248,768.32 : x
  2. Step 2: Convert to fraction form
    420,886.40/580,672.32 = 248,768.32/x
  3. Step 3: Cross multiply
    420,886.40x = 580,672.32 × 248,768.32
  4. Step 4: Simplify right side
    420,886.40x = 144,452,877,516.90
  5. Step 5: Solve for x
    x = 144,452,877,516.90/420,886.40
  6. Step 6: Final answer
    x = 343,211.08

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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.