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Finding the Fourth Proportional to 1,433,514.64, 1,978,208.20 and 788,934.48

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Solution

The fourth proportional to 1,433,514.64, 1,978,208.20 and 788,934.48 is: 1,088,706.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,433,514.64 : 1,978,208.20 = 788,934.48 : x
  2. Step 2: Convert to fraction form
    1,433,514.64/1,978,208.20 = 788,934.48/x
  3. Step 3: Cross multiply
    1,433,514.64x = 1,978,208.20 × 788,934.48
  4. Step 4: Simplify right side
    1,433,514.64x = 1,560,676,657,598.74
  5. Step 5: Solve for x
    x = 1,560,676,657,598.74/1,433,514.64
  6. Step 6: Final answer
    x = 1,088,706.47

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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.