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Finding the Fourth Proportional to 628,859.21, 867,841.38 and 342,395.01

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Solution

The fourth proportional to 628,859.21, 867,841.38 and 342,395.01 is: 472,513.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,859.21 : 867,841.38 = 342,395.01 : x
  2. Step 2: Convert to fraction form
    628,859.21/867,841.38 = 342,395.01/x
  3. Step 3: Cross multiply
    628,859.21x = 867,841.38 × 342,395.01
  4. Step 4: Simplify right side
    628,859.21x = 297,144,557,983.51
  5. Step 5: Solve for x
    x = 297,144,557,983.51/628,859.21
  6. Step 6: Final answer
    x = 472,513.65

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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.