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Finding the Fourth Proportional to 356,909.60, 492,533.93 and 220,916.47

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Solution

The fourth proportional to 356,909.60, 492,533.93 and 220,916.47 is: 304,863.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,909.60 : 492,533.93 = 220,916.47 : x
  2. Step 2: Convert to fraction form
    356,909.60/492,533.93 = 220,916.47/x
  3. Step 3: Cross multiply
    356,909.60x = 492,533.93 × 220,916.47
  4. Step 4: Simplify right side
    356,909.60x = 108,808,856,066.25
  5. Step 5: Solve for x
    x = 108,808,856,066.25/356,909.60
  6. Step 6: Final answer
    x = 304,863.91

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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.