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Finding the Fourth Proportional to 611,712.90, 917,897.40 and 256,762.80

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Solution

The fourth proportional to 611,712.90, 917,897.40 and 256,762.80 is: 385,281.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,712.90 : 917,897.40 = 256,762.80 : x
  2. Step 2: Convert to fraction form
    611,712.90/917,897.40 = 256,762.80/x
  3. Step 3: Cross multiply
    611,712.90x = 917,897.40 × 256,762.80
  4. Step 4: Simplify right side
    611,712.90x = 235,681,906,536.72
  5. Step 5: Solve for x
    x = 235,681,906,536.72/611,712.90
  6. Step 6: Final answer
    x = 385,281.90

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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.