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Finding the Fourth Proportional to 660,577.96, 990,613.41 and 281,258.20

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Solution

The fourth proportional to 660,577.96, 990,613.41 and 281,258.20 is: 421,779.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,577.96 : 990,613.41 = 281,258.20 : x
  2. Step 2: Convert to fraction form
    660,577.96/990,613.41 = 281,258.20/x
  3. Step 3: Cross multiply
    660,577.96x = 990,613.41 × 281,258.20
  4. Step 4: Simplify right side
    660,577.96x = 278,618,144,592.46
  5. Step 5: Solve for x
    x = 278,618,144,592.46/660,577.96
  6. Step 6: Final answer
    x = 421,779.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.