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Finding the Fourth Proportional to 420,479.69, 630,802.61 and 154,242.51

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Solution

The fourth proportional to 420,479.69, 630,802.61 and 154,242.51 is: 231,394.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,479.69 : 630,802.61 = 154,242.51 : x
  2. Step 2: Convert to fraction form
    420,479.69/630,802.61 = 154,242.51/x
  3. Step 3: Cross multiply
    420,479.69x = 630,802.61 × 154,242.51
  4. Step 4: Simplify right side
    420,479.69x = 97,296,577,880.95
  5. Step 5: Solve for x
    x = 97,296,577,880.95/420,479.69
  6. Step 6: Final answer
    x = 231,394.24

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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.