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Finding the Fourth Proportional to 611,117.90, 917,004.90 and 256,167.80

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Solution

The fourth proportional to 611,117.90, 917,004.90 and 256,167.80 is: 384,389.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,117.90 : 917,004.90 = 256,167.80 : x
  2. Step 2: Convert to fraction form
    611,117.90/917,004.90 = 256,167.80/x
  3. Step 3: Cross multiply
    611,117.90x = 917,004.90 × 256,167.80
  4. Step 4: Simplify right side
    611,117.90x = 234,907,127,822.22
  5. Step 5: Solve for x
    x = 234,907,127,822.22/611,117.90
  6. Step 6: Final answer
    x = 384,389.21

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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.