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Finding the Fourth Proportional to 398,400.28, 549,819.58 and 243,417.92

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Solution

The fourth proportional to 398,400.28, 549,819.58 and 243,417.92 is: 335,933.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,400.28 : 549,819.58 = 243,417.92 : x
  2. Step 2: Convert to fraction form
    398,400.28/549,819.58 = 243,417.92/x
  3. Step 3: Cross multiply
    398,400.28x = 549,819.58 × 243,417.92
  4. Step 4: Simplify right side
    398,400.28x = 133,835,938,538.87
  5. Step 5: Solve for x
    x = 133,835,938,538.87/398,400.28
  6. Step 6: Final answer
    x = 335,933.34

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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.