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Finding the Fourth Proportional to 915,799, 1,263,802.62 and 513,391

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Solution

The fourth proportional to 915,799, 1,263,802.62 and 513,391 is: 708,479.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    915,799 : 1,263,802.62 = 513,391 : x
  2. Step 2: Convert to fraction form
    915,799/1,263,802.62 = 513,391/x
  3. Step 3: Cross multiply
    915,799x = 1,263,802.62 × 513,391
  4. Step 4: Simplify right side
    915,799x = 648,824,890,884.42
  5. Step 5: Solve for x
    x = 648,824,890,884.42/915,799
  6. Step 6: Final answer
    x = 708,479.58

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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.