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Finding the Fourth Proportional to 1,248,948.72, 1,723,590.96 and 765,420.46

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Solution

The fourth proportional to 1,248,948.72, 1,723,590.96 and 765,420.46 is: 1,056,305.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,248,948.72 : 1,723,590.96 = 765,420.46 : x
  2. Step 2: Convert to fraction form
    1,248,948.72/1,723,590.96 = 765,420.46/x
  3. Step 3: Cross multiply
    1,248,948.72x = 1,723,590.96 × 765,420.46
  4. Step 4: Simplify right side
    1,248,948.72x = 1,319,271,785,455.04
  5. Step 5: Solve for x
    x = 1,319,271,785,455.04/1,248,948.72
  6. Step 6: Final answer
    x = 1,056,305.81

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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.