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Finding the Fourth Proportional to 640,294.80, 960,490.80 and 190,980.52

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Solution

The fourth proportional to 640,294.80, 960,490.80 and 190,980.52 is: 286,485.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,294.80 : 960,490.80 = 190,980.52 : x
  2. Step 2: Convert to fraction form
    640,294.80/960,490.80 = 190,980.52/x
  3. Step 3: Cross multiply
    640,294.80x = 960,490.80 × 190,980.52
  4. Step 4: Simplify right side
    640,294.80x = 183,435,032,439.22
  5. Step 5: Solve for x
    x = 183,435,032,439.22/640,294.80
  6. Step 6: Final answer
    x = 286,485.28

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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.