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Finding the Fourth Proportional to 529,685.55, 730,968.98 and 311,903.69

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Solution

The fourth proportional to 529,685.55, 730,968.98 and 311,903.69 is: 430,428.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    529,685.55 : 730,968.98 = 311,903.69 : x
  2. Step 2: Convert to fraction form
    529,685.55/730,968.98 = 311,903.69/x
  3. Step 3: Cross multiply
    529,685.55x = 730,968.98 × 311,903.69
  4. Step 4: Simplify right side
    529,685.55x = 227,991,916,923.17
  5. Step 5: Solve for x
    x = 227,991,916,923.17/529,685.55
  6. Step 6: Final answer
    x = 430,428.80

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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.