Home / 459,667,719.40-689,501,579.10-287,339,117.80

Finding the Fourth Proportional to 459,667,719.40, 689,501,579.10 and 287,339,117.80

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Solution

The fourth proportional to 459,667,719.40, 689,501,579.10 and 287,339,117.80 is: 431,008,676.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,667,719.40 : 689,501,579.10 = 287,339,117.80 : x
  2. Step 2: Convert to fraction form
    459,667,719.40/689,501,579.10 = 287,339,117.80/x
  3. Step 3: Cross multiply
    459,667,719.40x = 689,501,579.10 × 287,339,117.80
  4. Step 4: Simplify right side
    459,667,719.40x = 198,120,775,460,300,928
  5. Step 5: Solve for x
    x = 198,120,775,460,300,928/459,667,719.40
  6. Step 6: Final answer
    x = 431,008,676.70

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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.