Home / 691,814.70-1,038,159.45-407,504.70

Finding the Fourth Proportional to 691,814.70, 1,038,159.45 and 407,504.70

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Solution

The fourth proportional to 691,814.70, 1,038,159.45 and 407,504.70 is: 611,514.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,814.70 : 1,038,159.45 = 407,504.70 : x
  2. Step 2: Convert to fraction form
    691,814.70/1,038,159.45 = 407,504.70/x
  3. Step 3: Cross multiply
    691,814.70x = 1,038,159.45 × 407,504.70
  4. Step 4: Simplify right side
    691,814.70x = 423,054,855,224.42
  5. Step 5: Solve for x
    x = 423,054,855,224.42/691,814.70
  6. Step 6: Final answer
    x = 611,514.69

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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.