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Finding the Fourth Proportional to 315,429.05, 473,390.76 and 220,038.77

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Solution

The fourth proportional to 315,429.05, 473,390.76 and 220,038.77 is: 330,230.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,429.05 : 473,390.76 = 220,038.77 : x
  2. Step 2: Convert to fraction form
    315,429.05/473,390.76 = 220,038.77/x
  3. Step 3: Cross multiply
    315,429.05x = 473,390.76 × 220,038.77
  4. Step 4: Simplify right side
    315,429.05x = 104,164,319,577.33
  5. Step 5: Solve for x
    x = 104,164,319,577.33/315,429.05
  6. Step 6: Final answer
    x = 330,230.59

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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.