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Finding the Fourth Proportional to 991,714.16, 1,487,599.32 and 243,758

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Solution

The fourth proportional to 991,714.16, 1,487,599.32 and 243,758 is: 365,643.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    991,714.16 : 1,487,599.32 = 243,758 : x
  2. Step 2: Convert to fraction form
    991,714.16/1,487,599.32 = 243,758/x
  3. Step 3: Cross multiply
    991,714.16x = 1,487,599.32 × 243,758
  4. Step 4: Simplify right side
    991,714.16x = 362,614,235,044.56
  5. Step 5: Solve for x
    x = 362,614,235,044.56/991,714.16
  6. Step 6: Final answer
    x = 365,643.90

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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.