Home / 429,890.59-643,852.53-205,408.81

Finding the Fourth Proportional to 429,890.59, 643,852.53 and 205,408.81

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Solution

The fourth proportional to 429,890.59, 643,852.53 and 205,408.81 is: 307,643.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,890.59 : 643,852.53 = 205,408.81 : x
  2. Step 2: Convert to fraction form
    429,890.59/643,852.53 = 205,408.81/x
  3. Step 3: Cross multiply
    429,890.59x = 643,852.53 × 205,408.81
  4. Step 4: Simplify right side
    429,890.59x = 132,252,982,807.61
  5. Step 5: Solve for x
    x = 132,252,982,807.61/429,890.59
  6. Step 6: Final answer
    x = 307,643.35

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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.