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Finding the Fourth Proportional to 720,782.94, 994,701.23 and 398,513.85

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Solution

The fourth proportional to 720,782.94, 994,701.23 and 398,513.85 is: 549,960.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,782.94 : 994,701.23 = 398,513.85 : x
  2. Step 2: Convert to fraction form
    720,782.94/994,701.23 = 398,513.85/x
  3. Step 3: Cross multiply
    720,782.94x = 994,701.23 × 398,513.85
  4. Step 4: Simplify right side
    720,782.94x = 396,402,216,767.04
  5. Step 5: Solve for x
    x = 396,402,216,767.04/720,782.94
  6. Step 6: Final answer
    x = 549,960.60

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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.