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Finding the Fourth Proportional to 1,258,000.32, 1,886,807 and 689,663

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Solution

The fourth proportional to 1,258,000.32, 1,886,807 and 689,663 is: 1,034,388.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,258,000.32 : 1,886,807 = 689,663 : x
  2. Step 2: Convert to fraction form
    1,258,000.32/1,886,807 = 689,663/x
  3. Step 3: Cross multiply
    1,258,000.32x = 1,886,807 × 689,663
  4. Step 4: Simplify right side
    1,258,000.32x = 1,301,260,976,041
  5. Step 5: Solve for x
    x = 1,301,260,976,041/1,258,000.32
  6. Step 6: Final answer
    x = 1,034,388.43

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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.