Home / 911,967.21-1,258,518.72-498,512.43

Finding the Fourth Proportional to 911,967.21, 1,258,518.72 and 498,512.43

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Solution

The fourth proportional to 911,967.21, 1,258,518.72 and 498,512.43 is: 687,949.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,967.21 : 1,258,518.72 = 498,512.43 : x
  2. Step 2: Convert to fraction form
    911,967.21/1,258,518.72 = 498,512.43/x
  3. Step 3: Cross multiply
    911,967.21x = 1,258,518.72 × 498,512.43
  4. Step 4: Simplify right side
    911,967.21x = 627,387,225,307.69
  5. Step 5: Solve for x
    x = 627,387,225,307.69/911,967.21
  6. Step 6: Final answer
    x = 687,949.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.