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Finding the Fourth Proportional to 1,575,128, 2,173,676.64 and 859,736

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Solution

The fourth proportional to 1,575,128, 2,173,676.64 and 859,736 is: 1,186,435.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,575,128 : 2,173,676.64 = 859,736 : x
  2. Step 2: Convert to fraction form
    1,575,128/2,173,676.64 = 859,736/x
  3. Step 3: Cross multiply
    1,575,128x = 2,173,676.64 × 859,736
  4. Step 4: Simplify right side
    1,575,128x = 1,868,788,059,767.04
  5. Step 5: Solve for x
    x = 1,868,788,059,767.04/1,575,128
  6. Step 6: Final answer
    x = 1,186,435.68

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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.