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Finding the Fourth Proportional to 318,689.55, 478,329.57 and 161,028.72

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Solution

The fourth proportional to 318,689.55, 478,329.57 and 161,028.72 is: 241,692.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,689.55 : 478,329.57 = 161,028.72 : x
  2. Step 2: Convert to fraction form
    318,689.55/478,329.57 = 161,028.72/x
  3. Step 3: Cross multiply
    318,689.55x = 478,329.57 × 161,028.72
  4. Step 4: Simplify right side
    318,689.55x = 77,024,798,395.25
  5. Step 5: Solve for x
    x = 77,024,798,395.25/318,689.55
  6. Step 6: Final answer
    x = 241,692.26

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1.5x scale

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.