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Finding the Fourth Proportional to 1,266,881.60, 1,748,470.54 and 776,764.42

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Solution

The fourth proportional to 1,266,881.60, 1,748,470.54 and 776,764.42 is: 1,072,041.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,266,881.60 : 1,748,470.54 = 776,764.42 : x
  2. Step 2: Convert to fraction form
    1,266,881.60/1,748,470.54 = 776,764.42/x
  3. Step 3: Cross multiply
    1,266,881.60x = 1,748,470.54 × 776,764.42
  4. Step 4: Simplify right side
    1,266,881.60x = 1,358,149,696,147.83
  5. Step 5: Solve for x
    x = 1,358,149,696,147.83/1,266,881.60
  6. Step 6: Final answer
    x = 1,072,041.54

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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.