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Finding the Fourth Proportional to 611,160.90, 917,069.40 and 256,210.80

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Solution

The fourth proportional to 611,160.90, 917,069.40 and 256,210.80 is: 384,453.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,160.90 : 917,069.40 = 256,210.80 : x
  2. Step 2: Convert to fraction form
    611,160.90/917,069.40 = 256,210.80/x
  3. Step 3: Cross multiply
    611,160.90x = 917,069.40 × 256,210.80
  4. Step 4: Simplify right side
    611,160.90x = 234,963,084,629.52
  5. Step 5: Solve for x
    x = 234,963,084,629.52/611,160.90
  6. Step 6: Final answer
    x = 384,453.73

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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.