Home / 911,905.35-1,258,390.20-503,986.11

Finding the Fourth Proportional to 911,905.35, 1,258,390.20 and 503,986.11

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Solution

The fourth proportional to 911,905.35, 1,258,390.20 and 503,986.11 is: 695,479.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,905.35 : 1,258,390.20 = 503,986.11 : x
  2. Step 2: Convert to fraction form
    911,905.35/1,258,390.20 = 503,986.11/x
  3. Step 3: Cross multiply
    911,905.35x = 1,258,390.20 × 503,986.11
  4. Step 4: Simplify right side
    911,905.35x = 634,211,181,760.12
  5. Step 5: Solve for x
    x = 634,211,181,760.12/911,905.35
  6. Step 6: Final answer
    x = 695,479.18

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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.