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Finding the Fourth Proportional to 439,547.40, 659,321.10 and 421,832.70

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Solution

The fourth proportional to 439,547.40, 659,321.10 and 421,832.70 is: 632,749.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,547.40 : 659,321.10 = 421,832.70 : x
  2. Step 2: Convert to fraction form
    439,547.40/659,321.10 = 421,832.70/x
  3. Step 3: Cross multiply
    439,547.40x = 659,321.10 × 421,832.70
  4. Step 4: Simplify right side
    439,547.40x = 278,123,199,779.97
  5. Step 5: Solve for x
    x = 278,123,199,779.97/439,547.40
  6. Step 6: Final answer
    x = 632,749.05

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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.