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Finding the Fourth Proportional to 430,085.55, 645,128.33 and 403,841.55

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Solution

The fourth proportional to 430,085.55, 645,128.33 and 403,841.55 is: 605,762.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,085.55 : 645,128.33 = 403,841.55 : x
  2. Step 2: Convert to fraction form
    430,085.55/645,128.33 = 403,841.55/x
  3. Step 3: Cross multiply
    430,085.55x = 645,128.33 × 403,841.55
  4. Step 4: Simplify right side
    430,085.55x = 260,529,622,716.90
  5. Step 5: Solve for x
    x = 260,529,622,716.90/430,085.55
  6. Step 6: Final answer
    x = 605,762.33

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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.