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Finding the Fourth Proportional to 656,879.32, 906,492.78 and 355,073.32

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Solution

The fourth proportional to 656,879.32, 906,492.78 and 355,073.32 is: 490,000.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,879.32 : 906,492.78 = 355,073.32 : x
  2. Step 2: Convert to fraction form
    656,879.32/906,492.78 = 355,073.32/x
  3. Step 3: Cross multiply
    656,879.32x = 906,492.78 × 355,073.32
  4. Step 4: Simplify right side
    656,879.32x = 321,871,400,950.63
  5. Step 5: Solve for x
    x = 321,871,400,950.63/656,879.32
  6. Step 6: Final answer
    x = 490,000.81

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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.