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Finding the Fourth Proportional to 999,630.65, 1,378,055.51 and 712,652.51

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Solution

The fourth proportional to 999,630.65, 1,378,055.51 and 712,652.51 is: 982,437.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    999,630.65 : 1,378,055.51 = 712,652.51 : x
  2. Step 2: Convert to fraction form
    999,630.65/1,378,055.51 = 712,652.51/x
  3. Step 3: Cross multiply
    999,630.65x = 1,378,055.51 × 712,652.51
  4. Step 4: Simplify right side
    999,630.65x = 982,074,710,339.74
  5. Step 5: Solve for x
    x = 982,074,710,339.74/999,630.65
  6. Step 6: Final answer
    x = 982,437.58

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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.