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Finding the Fourth Proportional to 515,779.20, 773,668.80 and 403,804.80

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Solution

The fourth proportional to 515,779.20, 773,668.80 and 403,804.80 is: 605,707.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,779.20 : 773,668.80 = 403,804.80 : x
  2. Step 2: Convert to fraction form
    515,779.20/773,668.80 = 403,804.80/x
  3. Step 3: Cross multiply
    515,779.20x = 773,668.80 × 403,804.80
  4. Step 4: Simplify right side
    515,779.20x = 312,411,175,050.24
  5. Step 5: Solve for x
    x = 312,411,175,050.24/515,779.20
  6. Step 6: Final answer
    x = 605,707.20

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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.