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Finding the Fourth Proportional to 640,303.82, 883,514.36 and 378,622.82

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Solution

The fourth proportional to 640,303.82, 883,514.36 and 378,622.82 is: 522,437.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,303.82 : 883,514.36 = 378,622.82 : x
  2. Step 2: Convert to fraction form
    640,303.82/883,514.36 = 378,622.82/x
  3. Step 3: Cross multiply
    640,303.82x = 883,514.36 × 378,622.82
  4. Step 4: Simplify right side
    640,303.82x = 334,518,700,229.20
  5. Step 5: Solve for x
    x = 334,518,700,229.20/640,303.82
  6. Step 6: Final answer
    x = 522,437.46

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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.