Home / 1,285,005.10-1,927,507.65-687,808.30

Finding the Fourth Proportional to 1,285,005.10, 1,927,507.65 and 687,808.30

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Solution

The fourth proportional to 1,285,005.10, 1,927,507.65 and 687,808.30 is: 1,031,712.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,285,005.10 : 1,927,507.65 = 687,808.30 : x
  2. Step 2: Convert to fraction form
    1,285,005.10/1,927,507.65 = 687,808.30/x
  3. Step 3: Cross multiply
    1,285,005.10x = 1,927,507.65 × 687,808.30
  4. Step 4: Simplify right side
    1,285,005.10x = 1,325,755,759,983.50
  5. Step 5: Solve for x
    x = 1,325,755,759,983.50/1,285,005.10
  6. Step 6: Final answer
    x = 1,031,712.45

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.