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Finding the Fourth Proportional to 461,489.40, 692,169.30 and 145,978.20

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Solution

The fourth proportional to 461,489.40, 692,169.30 and 145,978.20 is: 218,946.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    461,489.40 : 692,169.30 = 145,978.20 : x
  2. Step 2: Convert to fraction form
    461,489.40/692,169.30 = 145,978.20/x
  3. Step 3: Cross multiply
    461,489.40x = 692,169.30 × 145,978.20
  4. Step 4: Simplify right side
    461,489.40x = 101,041,628,509.26
  5. Step 5: Solve for x
    x = 101,041,628,509.26/461,489.40
  6. Step 6: Final answer
    x = 218,946.80

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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.