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Finding the Fourth Proportional to 1,396,899.72, 1,927,953.54 and 824,080.68

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Solution

The fourth proportional to 1,396,899.72, 1,927,953.54 and 824,080.68 is: 1,137,368.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,396,899.72 : 1,927,953.54 = 824,080.68 : x
  2. Step 2: Convert to fraction form
    1,396,899.72/1,927,953.54 = 824,080.68/x
  3. Step 3: Cross multiply
    1,396,899.72x = 1,927,953.54 × 824,080.68
  4. Step 4: Simplify right side
    1,396,899.72x = 1,588,789,264,251.61
  5. Step 5: Solve for x
    x = 1,588,789,264,251.61/1,396,899.72
  6. Step 6: Final answer
    x = 1,137,368.16

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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.