Home / 426,984.30-640,509.51-142,675.83

Finding the Fourth Proportional to 426,984.30, 640,509.51 and 142,675.83

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Solution

The fourth proportional to 426,984.30, 640,509.51 and 142,675.83 is: 214,024.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,984.30 : 640,509.51 = 142,675.83 : x
  2. Step 2: Convert to fraction form
    426,984.30/640,509.51 = 142,675.83/x
  3. Step 3: Cross multiply
    426,984.30x = 640,509.51 × 142,675.83
  4. Step 4: Simplify right side
    426,984.30x = 91,385,225,962.14
  5. Step 5: Solve for x
    x = 91,385,225,962.14/426,984.30
  6. Step 6: Final answer
    x = 214,024.79

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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.