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Finding the Fourth Proportional to 720,830.80, 994,706.22 and 398,522.08

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Solution

The fourth proportional to 720,830.80, 994,706.22 and 398,522.08 is: 549,938.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,830.80 : 994,706.22 = 398,522.08 : x
  2. Step 2: Convert to fraction form
    720,830.80/994,706.22 = 398,522.08/x
  3. Step 3: Cross multiply
    720,830.80x = 994,706.22 × 398,522.08
  4. Step 4: Simplify right side
    720,830.80x = 396,412,391,783.34
  5. Step 5: Solve for x
    x = 396,412,391,783.34/720,830.80
  6. Step 6: Final answer
    x = 549,938.20

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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.