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Finding the Fourth Proportional to 1,353,666.87, 1,867,360.86 and 917,936.64

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Solution

The fourth proportional to 1,353,666.87, 1,867,360.86 and 917,936.64 is: 1,266,278.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,353,666.87 : 1,867,360.86 = 917,936.64 : x
  2. Step 2: Convert to fraction form
    1,353,666.87/1,867,360.86 = 917,936.64/x
  3. Step 3: Cross multiply
    1,353,666.87x = 1,867,360.86 × 917,936.64
  4. Step 4: Simplify right side
    1,353,666.87x = 1,714,118,953,495.91
  5. Step 5: Solve for x
    x = 1,714,118,953,495.91/1,353,666.87
  6. Step 6: Final answer
    x = 1,266,278.28

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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.