Home / 457,823.60-686,735.40-390,172.40

Finding the Fourth Proportional to 457,823.60, 686,735.40 and 390,172.40

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Solution

The fourth proportional to 457,823.60, 686,735.40 and 390,172.40 is: 585,258.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,823.60 : 686,735.40 = 390,172.40 : x
  2. Step 2: Convert to fraction form
    457,823.60/686,735.40 = 390,172.40/x
  3. Step 3: Cross multiply
    457,823.60x = 686,735.40 × 390,172.40
  4. Step 4: Simplify right side
    457,823.60x = 267,945,199,182.96
  5. Step 5: Solve for x
    x = 267,945,199,182.96/457,823.60
  6. Step 6: Final answer
    x = 585,258.60

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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.