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Finding the Fourth Proportional to 640,277.15, 960,404.76 and 190,999.31

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Solution

The fourth proportional to 640,277.15, 960,404.76 and 190,999.31 is: 286,495.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,277.15 : 960,404.76 = 190,999.31 : x
  2. Step 2: Convert to fraction form
    640,277.15/960,404.76 = 190,999.31/x
  3. Step 3: Cross multiply
    640,277.15x = 960,404.76 × 190,999.31
  4. Step 4: Simplify right side
    640,277.15x = 183,436,641,678.69
  5. Step 5: Solve for x
    x = 183,436,641,678.69/640,277.15
  6. Step 6: Final answer
    x = 286,495.69

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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.