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Finding the Fourth Proportional to 720,631.95, 994,454.60 and 398,333.76

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Solution

The fourth proportional to 720,631.95, 994,454.60 and 398,333.76 is: 549,690.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,631.95 : 994,454.60 = 398,333.76 : x
  2. Step 2: Convert to fraction form
    720,631.95/994,454.60 = 398,333.76/x
  3. Step 3: Cross multiply
    720,631.95x = 994,454.60 × 398,333.76
  4. Step 4: Simplify right side
    720,631.95x = 396,124,837,975.63
  5. Step 5: Solve for x
    x = 396,124,837,975.63/720,631.95
  6. Step 6: Final answer
    x = 549,690.92

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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.