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Finding the Fourth Proportional to 620,897.51, 856,846.28 and 375,879.02

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Solution

The fourth proportional to 620,897.51, 856,846.28 and 375,879.02 is: 518,717.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,897.51 : 856,846.28 = 375,879.02 : x
  2. Step 2: Convert to fraction form
    620,897.51/856,846.28 = 375,879.02/x
  3. Step 3: Cross multiply
    620,897.51x = 856,846.28 × 375,879.02
  4. Step 4: Simplify right side
    620,897.51x = 322,070,540,017.05
  5. Step 5: Solve for x
    x = 322,070,540,017.05/620,897.51
  6. Step 6: Final answer
    x = 518,717.72

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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.