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Finding the Fourth Proportional to 620,896.51, 856,844.90 and 375,878.02

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Solution

The fourth proportional to 620,896.51, 856,844.90 and 375,878.02 is: 518,716.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,896.51 : 856,844.90 = 375,878.02 : x
  2. Step 2: Convert to fraction form
    620,896.51/856,844.90 = 375,878.02/x
  3. Step 3: Cross multiply
    620,896.51x = 856,844.90 × 375,878.02
  4. Step 4: Simplify right side
    620,896.51x = 322,069,164,459.10
  5. Step 5: Solve for x
    x = 322,069,164,459.10/620,896.51
  6. Step 6: Final answer
    x = 518,716.34

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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.