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Finding the Fourth Proportional to 611,582.60, 917,373.90 and 256,851.20

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Solution

The fourth proportional to 611,582.60, 917,373.90 and 256,851.20 is: 385,276.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,582.60 : 917,373.90 = 256,851.20 : x
  2. Step 2: Convert to fraction form
    611,582.60/917,373.90 = 256,851.20/x
  3. Step 3: Cross multiply
    611,582.60x = 917,373.90 × 256,851.20
  4. Step 4: Simplify right side
    611,582.60x = 235,628,587,063.68
  5. Step 5: Solve for x
    x = 235,628,587,063.68/611,582.60
  6. Step 6: Final answer
    x = 385,276.80

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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.