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Finding the Fourth Proportional to 219,364.60, 328,390.80 and 130,572.40

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Solution

The fourth proportional to 219,364.60, 328,390.80 and 130,572.40 is: 195,468.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,364.60 : 328,390.80 = 130,572.40 : x
  2. Step 2: Convert to fraction form
    219,364.60/328,390.80 = 130,572.40/x
  3. Step 3: Cross multiply
    219,364.60x = 328,390.80 × 130,572.40
  4. Step 4: Simplify right side
    219,364.60x = 42,878,774,893.92
  5. Step 5: Solve for x
    x = 42,878,774,893.92/219,364.60
  6. Step 6: Final answer
    x = 195,468.07

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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.