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Finding the Fourth Proportional to 418,421.40, 577,569.60 and 248,653.50

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Solution

The fourth proportional to 418,421.40, 577,569.60 and 248,653.50 is: 343,229.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,421.40 : 577,569.60 = 248,653.50 : x
  2. Step 2: Convert to fraction form
    418,421.40/577,569.60 = 248,653.50/x
  3. Step 3: Cross multiply
    418,421.40x = 577,569.60 × 248,653.50
  4. Step 4: Simplify right side
    418,421.40x = 143,614,702,533.60
  5. Step 5: Solve for x
    x = 143,614,702,533.60/418,421.40
  6. Step 6: Final answer
    x = 343,229.82

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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.