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Finding the Fourth Proportional to 640,645.76, 961,548.28 and 341,379.20

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Solution

The fourth proportional to 640,645.76, 961,548.28 and 341,379.20 is: 512,377.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,645.76 : 961,548.28 = 341,379.20 : x
  2. Step 2: Convert to fraction form
    640,645.76/961,548.28 = 341,379.20/x
  3. Step 3: Cross multiply
    640,645.76x = 961,548.28 × 341,379.20
  4. Step 4: Simplify right side
    640,645.76x = 328,252,582,587.78
  5. Step 5: Solve for x
    x = 328,252,582,587.78/640,645.76
  6. Step 6: Final answer
    x = 512,377.67

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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.