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Finding the Fourth Proportional to 720,351.34, 994,144.71 and 398,124.34

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Solution

The fourth proportional to 720,351.34, 994,144.71 and 398,124.34 is: 549,444.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,351.34 : 994,144.71 = 398,124.34 : x
  2. Step 2: Convert to fraction form
    720,351.34/994,144.71 = 398,124.34/x
  3. Step 3: Cross multiply
    720,351.34x = 994,144.71 × 398,124.34
  4. Step 4: Simplify right side
    720,351.34x = 395,793,206,533.24
  5. Step 5: Solve for x
    x = 395,793,206,533.24/720,351.34
  6. Step 6: Final answer
    x = 549,444.67

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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.