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Finding the Fourth Proportional to 443,563.95, 665,345.93 and 139,988.87

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Solution

The fourth proportional to 443,563.95, 665,345.93 and 139,988.87 is: 209,983.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,563.95 : 665,345.93 = 139,988.87 : x
  2. Step 2: Convert to fraction form
    443,563.95/665,345.93 = 139,988.87/x
  3. Step 3: Cross multiply
    443,563.95x = 665,345.93 × 139,988.87
  4. Step 4: Simplify right side
    443,563.95x = 93,141,020,873.13
  5. Step 5: Solve for x
    x = 93,141,020,873.13/443,563.95
  6. Step 6: Final answer
    x = 209,983.30

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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.