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Finding the Fourth Proportional to 487,978.40, 732,087.60 and 168,135.20

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Solution

The fourth proportional to 487,978.40, 732,087.60 and 168,135.20 is: 252,244.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,978.40 : 732,087.60 = 168,135.20 : x
  2. Step 2: Convert to fraction form
    487,978.40/732,087.60 = 168,135.20/x
  3. Step 3: Cross multiply
    487,978.40x = 732,087.60 × 168,135.20
  4. Step 4: Simplify right side
    487,978.40x = 123,089,695,043.52
  5. Step 5: Solve for x
    x = 123,089,695,043.52/487,978.40
  6. Step 6: Final answer
    x = 252,244.15

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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.