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Finding the Fourth Proportional to 628,865.19, 867,832.65 and 342,382.77

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Solution

The fourth proportional to 628,865.19, 867,832.65 and 342,382.77 is: 472,487.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,865.19 : 867,832.65 = 342,382.77 : x
  2. Step 2: Convert to fraction form
    628,865.19/867,832.65 = 342,382.77/x
  3. Step 3: Cross multiply
    628,865.19x = 867,832.65 × 342,382.77
  4. Step 4: Simplify right side
    628,865.19x = 297,130,946,603.44
  5. Step 5: Solve for x
    x = 297,130,946,603.44/628,865.19
  6. Step 6: Final answer
    x = 472,487.51

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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.