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Finding the Fourth Proportional to 463,564.80, 695,347.20 and 420,019.20

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Solution

The fourth proportional to 463,564.80, 695,347.20 and 420,019.20 is: 630,028.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    463,564.80 : 695,347.20 = 420,019.20 : x
  2. Step 2: Convert to fraction form
    463,564.80/695,347.20 = 420,019.20/x
  3. Step 3: Cross multiply
    463,564.80x = 695,347.20 × 420,019.20
  4. Step 4: Simplify right side
    463,564.80x = 292,059,174,666.24
  5. Step 5: Solve for x
    x = 292,059,174,666.24/463,564.80
  6. Step 6: Final answer
    x = 630,028.80

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Similar ratio
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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.