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Finding the Fourth Proportional to 518,263.03, 715,193.26 and 288,815.28

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Solution

The fourth proportional to 518,263.03, 715,193.26 and 288,815.28 is: 398,559.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,263.03 : 715,193.26 = 288,815.28 : x
  2. Step 2: Convert to fraction form
    518,263.03/715,193.26 = 288,815.28/x
  3. Step 3: Cross multiply
    518,263.03x = 715,193.26 × 288,815.28
  4. Step 4: Simplify right side
    518,263.03x = 206,558,741,641.01
  5. Step 5: Solve for x
    x = 206,558,741,641.01/518,263.03
  6. Step 6: Final answer
    x = 398,559.67

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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.