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Finding the Fourth Proportional to 640,292.80, 960,487.80 and 190,978.52

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Solution

The fourth proportional to 640,292.80, 960,487.80 and 190,978.52 is: 286,482.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,292.80 : 960,487.80 = 190,978.52 : x
  2. Step 2: Convert to fraction form
    640,292.80/960,487.80 = 190,978.52/x
  3. Step 3: Cross multiply
    640,292.80x = 960,487.80 × 190,978.52
  4. Step 4: Simplify right side
    640,292.80x = 183,432,538,522.06
  5. Step 5: Solve for x
    x = 183,432,538,522.06/640,292.80
  6. Step 6: Final answer
    x = 286,482.28

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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.