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Finding the Fourth Proportional to 620,893.39, 856,840.59 and 375,874.88

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Solution

The fourth proportional to 620,893.39, 856,840.59 and 375,874.88 is: 518,712.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,893.39 : 856,840.59 = 375,874.88 : x
  2. Step 2: Convert to fraction form
    620,893.39/856,840.59 = 375,874.88/x
  3. Step 3: Cross multiply
    620,893.39x = 856,840.59 × 375,874.88
  4. Step 4: Simplify right side
    620,893.39x = 322,064,852,066.01
  5. Step 5: Solve for x
    x = 322,064,852,066.01/620,893.39
  6. Step 6: Final answer
    x = 518,712.00

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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.