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Finding the Fourth Proportional to 219,799.80, 330,428.70 and 190,931.40

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Solution

The fourth proportional to 219,799.80, 330,428.70 and 190,931.40 is: 287,030.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,799.80 : 330,428.70 = 190,931.40 : x
  2. Step 2: Convert to fraction form
    219,799.80/330,428.70 = 190,931.40/x
  3. Step 3: Cross multiply
    219,799.80x = 330,428.70 × 190,931.40
  4. Step 4: Simplify right side
    219,799.80x = 63,089,214,291.18
  5. Step 5: Solve for x
    x = 63,089,214,291.18/219,799.80
  6. Step 6: Final answer
    x = 287,030.35

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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.