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Finding the Fourth Proportional to 859,779.23, 1,289,668.82 and 385,911

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Solution

The fourth proportional to 859,779.23, 1,289,668.82 and 385,911 is: 578,866.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    859,779.23 : 1,289,668.82 = 385,911 : x
  2. Step 2: Convert to fraction form
    859,779.23/1,289,668.82 = 385,911/x
  3. Step 3: Cross multiply
    859,779.23x = 1,289,668.82 × 385,911
  4. Step 4: Simplify right side
    859,779.23x = 497,697,382,065.47
  5. Step 5: Solve for x
    x = 497,697,382,065.47/859,779.23
  6. Step 6: Final answer
    x = 578,866.49

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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.