Home / 728,709.50-1,005,706.86-426,903.50

Finding the Fourth Proportional to 728,709.50, 1,005,706.86 and 426,903.50

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Solution

The fourth proportional to 728,709.50, 1,005,706.86 and 426,903.50 is: 589,178.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,709.50 : 1,005,706.86 = 426,903.50 : x
  2. Step 2: Convert to fraction form
    728,709.50/1,005,706.86 = 426,903.50/x
  3. Step 3: Cross multiply
    728,709.50x = 1,005,706.86 × 426,903.50
  4. Step 4: Simplify right side
    728,709.50x = 429,339,778,508.01
  5. Step 5: Solve for x
    x = 429,339,778,508.01/728,709.50
  6. Step 6: Final answer
    x = 589,178.24

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.