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Finding the Fourth Proportional to 486,978.32, 671,980.20 and 334,147.52

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Solution

The fourth proportional to 486,978.32, 671,980.20 and 334,147.52 is: 461,089.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,978.32 : 671,980.20 = 334,147.52 : x
  2. Step 2: Convert to fraction form
    486,978.32/671,980.20 = 334,147.52/x
  3. Step 3: Cross multiply
    486,978.32x = 671,980.20 × 334,147.52
  4. Step 4: Simplify right side
    486,978.32x = 224,540,517,319.10
  5. Step 5: Solve for x
    x = 224,540,517,319.10/486,978.32
  6. Step 6: Final answer
    x = 461,089.35

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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.