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Finding the Fourth Proportional to 402,522.42, 554,909.22 and 320,128.34

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Solution

The fourth proportional to 402,522.42, 554,909.22 and 320,128.34 is: 441,322.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,522.42 : 554,909.22 = 320,128.34 : x
  2. Step 2: Convert to fraction form
    402,522.42/554,909.22 = 320,128.34/x
  3. Step 3: Cross multiply
    402,522.42x = 554,909.22 × 320,128.34
  4. Step 4: Simplify right side
    402,522.42x = 177,642,165,575.11
  5. Step 5: Solve for x
    x = 177,642,165,575.11/402,522.42
  6. Step 6: Final answer
    x = 441,322.41

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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.