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Finding the Fourth Proportional to 310,028.63, 465,045.47 and 85,401.45

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Solution

The fourth proportional to 310,028.63, 465,045.47 and 85,401.45 is: 128,102.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,028.63 : 465,045.47 = 85,401.45 : x
  2. Step 2: Convert to fraction form
    310,028.63/465,045.47 = 85,401.45/x
  3. Step 3: Cross multiply
    310,028.63x = 465,045.47 × 85,401.45
  4. Step 4: Simplify right side
    310,028.63x = 39,715,557,026.92
  5. Step 5: Solve for x
    x = 39,715,557,026.92/310,028.63
  6. Step 6: Final answer
    x = 128,102.87

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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.