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Finding the Fourth Proportional to 505,421.60, 756,058.80 and 455,655.20

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Solution

The fourth proportional to 505,421.60, 756,058.80 and 455,655.20 is: 681,613.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,421.60 : 756,058.80 = 455,655.20 : x
  2. Step 2: Convert to fraction form
    505,421.60/756,058.80 = 455,655.20/x
  3. Step 3: Cross multiply
    505,421.60x = 756,058.80 × 455,655.20
  4. Step 4: Simplify right side
    505,421.60x = 344,502,123,725.76
  5. Step 5: Solve for x
    x = 344,502,123,725.76/505,421.60
  6. Step 6: Final answer
    x = 681,613.38

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.