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Finding the Fourth Proportional to 991,712.16, 1,487,596.32 and 243,756

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Solution

The fourth proportional to 991,712.16, 1,487,596.32 and 243,756 is: 365,640.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    991,712.16 : 1,487,596.32 = 243,756 : x
  2. Step 2: Convert to fraction form
    991,712.16/1,487,596.32 = 243,756/x
  3. Step 3: Cross multiply
    991,712.16x = 1,487,596.32 × 243,756
  4. Step 4: Simplify right side
    991,712.16x = 362,610,528,577.92
  5. Step 5: Solve for x
    x = 362,610,528,577.92/991,712.16
  6. Step 6: Final answer
    x = 365,640.90

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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.