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Finding the Fourth Proportional to 1,555,656, 2,146,806.72 and 840,264

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Solution

The fourth proportional to 1,555,656, 2,146,806.72 and 840,264 is: 1,159,565.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,555,656 : 2,146,806.72 = 840,264 : x
  2. Step 2: Convert to fraction form
    1,555,656/2,146,806.72 = 840,264/x
  3. Step 3: Cross multiply
    1,555,656x = 2,146,806.72 × 840,264
  4. Step 4: Simplify right side
    1,555,656x = 1,803,884,401,774.08
  5. Step 5: Solve for x
    x = 1,803,884,401,774.08/1,555,656
  6. Step 6: Final answer
    x = 1,159,565.10

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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.