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Finding the Fourth Proportional to 656,657.40, 906,187.20 and 354,851.40

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Solution

The fourth proportional to 656,657.40, 906,187.20 and 354,851.40 is: 489,694.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,657.40 : 906,187.20 = 354,851.40 : x
  2. Step 2: Convert to fraction form
    656,657.40/906,187.20 = 354,851.40/x
  3. Step 3: Cross multiply
    656,657.40x = 906,187.20 × 354,851.40
  4. Step 4: Simplify right side
    656,657.40x = 321,561,796,582.08
  5. Step 5: Solve for x
    x = 321,561,796,582.08/656,657.40
  6. Step 6: Final answer
    x = 489,694.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.