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Finding the Fourth Proportional to 612,245.70, 917,603.10 and 312,845.40

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Solution

The fourth proportional to 612,245.70, 917,603.10 and 312,845.40 is: 468,876.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,245.70 : 917,603.10 = 312,845.40 : x
  2. Step 2: Convert to fraction form
    612,245.70/917,603.10 = 312,845.40/x
  3. Step 3: Cross multiply
    612,245.70x = 917,603.10 × 312,845.40
  4. Step 4: Simplify right side
    612,245.70x = 287,067,908,860.74
  5. Step 5: Solve for x
    x = 287,067,908,860.74/612,245.70
  6. Step 6: Final answer
    x = 468,876.97

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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.