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Finding the Fourth Proportional to 418,357.12, 577,416.80 and 248,558.56

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Solution

The fourth proportional to 418,357.12, 577,416.80 and 248,558.56 is: 343,060.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,357.12 : 577,416.80 = 248,558.56 : x
  2. Step 2: Convert to fraction form
    418,357.12/577,416.80 = 248,558.56/x
  3. Step 3: Cross multiply
    418,357.12x = 577,416.80 × 248,558.56
  4. Step 4: Simplify right side
    418,357.12x = 143,521,888,327.81
  5. Step 5: Solve for x
    x = 143,521,888,327.81/418,357.12
  6. Step 6: Final answer
    x = 343,060.70

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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.