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Finding the Fourth Proportional to 319,010.10, 478,515.15 and 274,686.90

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Solution

The fourth proportional to 319,010.10, 478,515.15 and 274,686.90 is: 412,030.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,010.10 : 478,515.15 = 274,686.90 : x
  2. Step 2: Convert to fraction form
    319,010.10/478,515.15 = 274,686.90/x
  3. Step 3: Cross multiply
    319,010.10x = 478,515.15 × 274,686.90
  4. Step 4: Simplify right side
    319,010.10x = 131,441,843,156.54
  5. Step 5: Solve for x
    x = 131,441,843,156.54/319,010.10
  6. Step 6: Final answer
    x = 412,030.35

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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.