Home / 420,913.20-631,365.48-243,307.20

Finding the Fourth Proportional to 420,913.20, 631,365.48 and 243,307.20

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Solution

The fourth proportional to 420,913.20, 631,365.48 and 243,307.20 is: 364,958.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,913.20 : 631,365.48 = 243,307.20 : x
  2. Step 2: Convert to fraction form
    420,913.20/631,365.48 = 243,307.20/x
  3. Step 3: Cross multiply
    420,913.20x = 631,365.48 × 243,307.20
  4. Step 4: Simplify right side
    420,913.20x = 153,615,767,115.46
  5. Step 5: Solve for x
    x = 153,615,767,115.46/420,913.20
  6. Step 6: Final answer
    x = 364,958.30

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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.