Home / 429,210.57-643,809.30-145,100.70

Finding the Fourth Proportional to 429,210.57, 643,809.30 and 145,100.70

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Solution

The fourth proportional to 429,210.57, 643,809.30 and 145,100.70 is: 217,648.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,210.57 : 643,809.30 = 145,100.70 : x
  2. Step 2: Convert to fraction form
    429,210.57/643,809.30 = 145,100.70/x
  3. Step 3: Cross multiply
    429,210.57x = 643,809.30 × 145,100.70
  4. Step 4: Simplify right side
    429,210.57x = 93,417,180,096.51
  5. Step 5: Solve for x
    x = 93,417,180,096.51/429,210.57
  6. Step 6: Final answer
    x = 217,648.83

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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.