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Finding the Fourth Proportional to 2,638,497.40, 3,957,746.10 and 865,569.40

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Solution

The fourth proportional to 2,638,497.40, 3,957,746.10 and 865,569.40 is: 1,298,354.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,638,497.40 : 3,957,746.10 = 865,569.40 : x
  2. Step 2: Convert to fraction form
    2,638,497.40/3,957,746.10 = 865,569.40/x
  3. Step 3: Cross multiply
    2,638,497.40x = 3,957,746.10 × 865,569.40
  4. Step 4: Simplify right side
    2,638,497.40x = 3,425,703,917,129.34
  5. Step 5: Solve for x
    x = 3,425,703,917,129.34/2,638,497.40
  6. Step 6: Final answer
    x = 1,298,354.10

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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.