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Finding the Fourth Proportional to 659,455.95, 989,339.42 and 525,028.25

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Solution

The fourth proportional to 659,455.95, 989,339.42 and 525,028.25 is: 787,666.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,455.95 : 989,339.42 = 525,028.25 : x
  2. Step 2: Convert to fraction form
    659,455.95/989,339.42 = 525,028.25/x
  3. Step 3: Cross multiply
    659,455.95x = 989,339.42 × 525,028.25
  4. Step 4: Simplify right side
    659,455.95x = 519,431,136,766.78
  5. Step 5: Solve for x
    x = 519,431,136,766.78/659,455.95
  6. Step 6: Final answer
    x = 787,666.16

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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.