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Finding the Fourth Proportional to 620,515.51, 856,065.17 and 358,822.46

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Solution

The fourth proportional to 620,515.51, 856,065.17 and 358,822.46 is: 495,032.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,515.51 : 856,065.17 = 358,822.46 : x
  2. Step 2: Convert to fraction form
    620,515.51/856,065.17 = 358,822.46/x
  3. Step 3: Cross multiply
    620,515.51x = 856,065.17 × 358,822.46
  4. Step 4: Simplify right side
    620,515.51x = 307,175,410,034.72
  5. Step 5: Solve for x
    x = 307,175,410,034.72/620,515.51
  6. Step 6: Final answer
    x = 495,032.60

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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.