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Finding the Fourth Proportional to 656,885.12, 906,501.72 and 355,079.12

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Solution

The fourth proportional to 656,885.12, 906,501.72 and 355,079.12 is: 490,009.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,885.12 : 906,501.72 = 355,079.12 : x
  2. Step 2: Convert to fraction form
    656,885.12/906,501.72 = 355,079.12/x
  3. Step 3: Cross multiply
    656,885.12x = 906,501.72 × 355,079.12
  4. Step 4: Simplify right side
    656,885.12x = 321,879,833,016.09
  5. Step 5: Solve for x
    x = 321,879,833,016.09/656,885.12
  6. Step 6: Final answer
    x = 490,009.32

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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.