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Finding the Fourth Proportional to 7,242,648.60, 10,865,285.10 and 3,639,347.40

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Solution

The fourth proportional to 7,242,648.60, 10,865,285.10 and 3,639,347.40 is: 5,459,680.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,242,648.60 : 10,865,285.10 = 3,639,347.40 : x
  2. Step 2: Convert to fraction form
    7,242,648.60/10,865,285.10 = 3,639,347.40/x
  3. Step 3: Cross multiply
    7,242,648.60x = 10,865,285.10 × 3,639,347.40
  4. Step 4: Simplify right side
    7,242,648.60x = 39,542,547,078,943.73
  5. Step 5: Solve for x
    x = 39,542,547,078,943.73/7,242,648.60
  6. Step 6: Final answer
    x = 5,459,680.47

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.