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Finding the Fourth Proportional to 617,688.80, 926,576.40 and 243,663.20

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Solution

The fourth proportional to 617,688.80, 926,576.40 and 243,663.20 is: 365,511.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,688.80 : 926,576.40 = 243,663.20 : x
  2. Step 2: Convert to fraction form
    617,688.80/926,576.40 = 243,663.20/x
  3. Step 3: Cross multiply
    617,688.80x = 926,576.40 × 243,663.20
  4. Step 4: Simplify right side
    617,688.80x = 225,772,570,668.48
  5. Step 5: Solve for x
    x = 225,772,570,668.48/617,688.80
  6. Step 6: Final answer
    x = 365,511.84

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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.