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Finding the Fourth Proportional to 1,587,778, 2,191,133.64 and 872,386

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Solution

The fourth proportional to 1,587,778, 2,191,133.64 and 872,386 is: 1,203,892.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,587,778 : 2,191,133.64 = 872,386 : x
  2. Step 2: Convert to fraction form
    1,587,778/2,191,133.64 = 872,386/x
  3. Step 3: Cross multiply
    1,587,778x = 2,191,133.64 × 872,386
  4. Step 4: Simplify right side
    1,587,778x = 1,911,514,311,665.04
  5. Step 5: Solve for x
    x = 1,911,514,311,665.04/1,587,778
  6. Step 6: Final answer
    x = 1,203,892.68

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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.