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Finding the Fourth Proportional to 738,762.34, 1,019,448.14 and 428,640.94

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Solution

The fourth proportional to 738,762.34, 1,019,448.14 and 428,640.94 is: 591,499.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    738,762.34 : 1,019,448.14 = 428,640.94 : x
  2. Step 2: Convert to fraction form
    738,762.34/1,019,448.14 = 428,640.94/x
  3. Step 3: Cross multiply
    738,762.34x = 1,019,448.14 × 428,640.94
  4. Step 4: Simplify right side
    738,762.34x = 436,977,209,010.85
  5. Step 5: Solve for x
    x = 436,977,209,010.85/738,762.34
  6. Step 6: Final answer
    x = 591,499.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.