Home / 813,643.50-1,220,465.34-315,007.50

Finding the Fourth Proportional to 813,643.50, 1,220,465.34 and 315,007.50

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Solution

The fourth proportional to 813,643.50, 1,220,465.34 and 315,007.50 is: 472,511.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    813,643.50 : 1,220,465.34 = 315,007.50 : x
  2. Step 2: Convert to fraction form
    813,643.50/1,220,465.34 = 315,007.50/x
  3. Step 3: Cross multiply
    813,643.50x = 1,220,465.34 × 315,007.50
  4. Step 4: Simplify right side
    813,643.50x = 384,455,735,590.05
  5. Step 5: Solve for x
    x = 384,455,735,590.05/813,643.50
  6. Step 6: Final answer
    x = 472,511.28

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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.