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Finding the Fourth Proportional to 2,890,547.76, 3,987,149.88 and 1,859,398.45

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Solution

The fourth proportional to 2,890,547.76, 3,987,149.88 and 1,859,398.45 is: 2,564,808.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,890,547.76 : 3,987,149.88 = 1,859,398.45 : x
  2. Step 2: Convert to fraction form
    2,890,547.76/3,987,149.88 = 1,859,398.45/x
  3. Step 3: Cross multiply
    2,890,547.76x = 3,987,149.88 × 1,859,398.45
  4. Step 4: Simplify right side
    2,890,547.76x = 7,413,700,303,794.56
  5. Step 5: Solve for x
    x = 7,413,700,303,794.56/2,890,547.76
  6. Step 6: Final answer
    x = 2,564,808.10

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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.