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Finding the Fourth Proportional to 1,351,770.86, 1,865,434.56 and 778,798.70

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Solution

The fourth proportional to 1,351,770.86, 1,865,434.56 and 778,798.70 is: 1,074,736.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,351,770.86 : 1,865,434.56 = 778,798.70 : x
  2. Step 2: Convert to fraction form
    1,351,770.86/1,865,434.56 = 778,798.70/x
  3. Step 3: Cross multiply
    1,351,770.86x = 1,865,434.56 × 778,798.70
  4. Step 4: Simplify right side
    1,351,770.86x = 1,452,798,010,263.07
  5. Step 5: Solve for x
    x = 1,452,798,010,263.07/1,351,770.86
  6. Step 6: Final answer
    x = 1,074,736.89

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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.