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Finding the Fourth Proportional to 1,402,785.04, 1,935,961.32 and 858,918.16

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Solution

The fourth proportional to 1,402,785.04, 1,935,961.32 and 858,918.16 is: 1,185,379.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,402,785.04 : 1,935,961.32 = 858,918.16 : x
  2. Step 2: Convert to fraction form
    1,402,785.04/1,935,961.32 = 858,918.16/x
  3. Step 3: Cross multiply
    1,402,785.04x = 1,935,961.32 × 858,918.16
  4. Step 4: Simplify right side
    1,402,785.04x = 1,662,832,334,805.57
  5. Step 5: Solve for x
    x = 1,662,832,334,805.57/1,402,785.04
  6. Step 6: Final answer
    x = 1,185,379.29

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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.