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Finding the Fourth Proportional to 646,518.26, 891,953.96 and 645,521.42

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Solution

The fourth proportional to 646,518.26, 891,953.96 and 645,521.42 is: 890,578.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,518.26 : 891,953.96 = 645,521.42 : x
  2. Step 2: Convert to fraction form
    646,518.26/891,953.96 = 645,521.42/x
  3. Step 3: Cross multiply
    646,518.26x = 891,953.96 × 645,521.42
  4. Step 4: Simplify right side
    646,518.26x = 575,775,386,833.82
  5. Step 5: Solve for x
    x = 575,775,386,833.82/646,518.26
  6. Step 6: Final answer
    x = 890,578.69

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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.