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Finding the Fourth Proportional to 553,516.72, 763,829.40 and 308,488.41

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Solution

The fourth proportional to 553,516.72, 763,829.40 and 308,488.41 is: 425,700.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,516.72 : 763,829.40 = 308,488.41 : x
  2. Step 2: Convert to fraction form
    553,516.72/763,829.40 = 308,488.41/x
  3. Step 3: Cross multiply
    553,516.72x = 763,829.40 × 308,488.41
  4. Step 4: Simplify right side
    553,516.72x = 235,632,519,026.83
  5. Step 5: Solve for x
    x = 235,632,519,026.83/553,516.72
  6. Step 6: Final answer
    x = 425,700.82

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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.