Home / 830,167.20-1,245,639.60-431,258.40

Finding the Fourth Proportional to 830,167.20, 1,245,639.60 and 431,258.40

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Solution

The fourth proportional to 830,167.20, 1,245,639.60 and 431,258.40 is: 647,089.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    830,167.20 : 1,245,639.60 = 431,258.40 : x
  2. Step 2: Convert to fraction form
    830,167.20/1,245,639.60 = 431,258.40/x
  3. Step 3: Cross multiply
    830,167.20x = 1,245,639.60 × 431,258.40
  4. Step 4: Simplify right side
    830,167.20x = 537,192,540,872.64
  5. Step 5: Solve for x
    x = 537,192,540,872.64/830,167.20
  6. Step 6: Final answer
    x = 647,089.58

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1.5x scale

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.