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Finding the Fourth Proportional to 445,420.16, 668,059.12 and 129,803.24

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Solution

The fourth proportional to 445,420.16, 668,059.12 and 129,803.24 is: 194,684.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,420.16 : 668,059.12 = 129,803.24 : x
  2. Step 2: Convert to fraction form
    445,420.16/668,059.12 = 129,803.24/x
  3. Step 3: Cross multiply
    445,420.16x = 668,059.12 × 129,803.24
  4. Step 4: Simplify right side
    445,420.16x = 86,716,238,287.55
  5. Step 5: Solve for x
    x = 86,716,238,287.55/445,420.16
  6. Step 6: Final answer
    x = 194,684.13

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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.