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Finding the Fourth Proportional to 219,612.60, 328,762.80 and 130,820.40

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Solution

The fourth proportional to 219,612.60, 328,762.80 and 130,820.40 is: 195,839.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,612.60 : 328,762.80 = 130,820.40 : x
  2. Step 2: Convert to fraction form
    219,612.60/328,762.80 = 130,820.40/x
  3. Step 3: Cross multiply
    219,612.60x = 328,762.80 × 130,820.40
  4. Step 4: Simplify right side
    219,612.60x = 43,008,881,001.12
  5. Step 5: Solve for x
    x = 43,008,881,001.12/219,612.60
  6. Step 6: Final answer
    x = 195,839.77

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1.5x scale

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.