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Finding the Fourth Proportional to 1,369,556.07, 1,890,592.80 and 818,466.30

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Solution

The fourth proportional to 1,369,556.07, 1,890,592.80 and 818,466.30 is: 1,129,845.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,369,556.07 : 1,890,592.80 = 818,466.30 : x
  2. Step 2: Convert to fraction form
    1,369,556.07/1,890,592.80 = 818,466.30/x
  3. Step 3: Cross multiply
    1,369,556.07x = 1,890,592.80 × 818,466.30
  4. Step 4: Simplify right side
    1,369,556.07x = 1,547,386,493,822.64
  5. Step 5: Solve for x
    x = 1,547,386,493,822.64/1,369,556.07
  6. Step 6: Final answer
    x = 1,129,845.30

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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.