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Finding the Fourth Proportional to 978,078.40, 1,465,735.20 and 602,987.20

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Solution

The fourth proportional to 978,078.40, 1,465,735.20 and 602,987.20 is: 903,628.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,078.40 : 1,465,735.20 = 602,987.20 : x
  2. Step 2: Convert to fraction form
    978,078.40/1,465,735.20 = 602,987.20/x
  3. Step 3: Cross multiply
    978,078.40x = 1,465,735.20 × 602,987.20
  4. Step 4: Simplify right side
    978,078.40x = 883,819,564,189.44
  5. Step 5: Solve for x
    x = 883,819,564,189.44/978,078.40
  6. Step 6: Final answer
    x = 903,628.55

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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.