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Finding the Fourth Proportional to 491,030.36, 678,003.18 and 383,413.76

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Solution

The fourth proportional to 491,030.36, 678,003.18 and 383,413.76 is: 529,408.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,030.36 : 678,003.18 = 383,413.76 : x
  2. Step 2: Convert to fraction form
    491,030.36/678,003.18 = 383,413.76/x
  3. Step 3: Cross multiply
    491,030.36x = 678,003.18 × 383,413.76
  4. Step 4: Simplify right side
    491,030.36x = 259,955,748,535.76
  5. Step 5: Solve for x
    x = 259,955,748,535.76/491,030.36
  6. Step 6: Final answer
    x = 529,408.71

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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.