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Finding the Fourth Proportional to 426,075.70, 638,627.88 and 266,225.44

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Solution

The fourth proportional to 426,075.70, 638,627.88 and 266,225.44 is: 399,034.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,075.70 : 638,627.88 = 266,225.44 : x
  2. Step 2: Convert to fraction form
    426,075.70/638,627.88 = 266,225.44/x
  3. Step 3: Cross multiply
    426,075.70x = 638,627.88 × 266,225.44
  4. Step 4: Simplify right side
    426,075.70x = 170,018,988,349.27
  5. Step 5: Solve for x
    x = 170,018,988,349.27/426,075.70
  6. Step 6: Final answer
    x = 399,034.70

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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.