Home / 319,389.21-478,265.67-309,929.22

Finding the Fourth Proportional to 319,389.21, 478,265.67 and 309,929.22

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Solution

The fourth proportional to 319,389.21, 478,265.67 and 309,929.22 is: 464,099.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,389.21 : 478,265.67 = 309,929.22 : x
  2. Step 2: Convert to fraction form
    319,389.21/478,265.67 = 309,929.22/x
  3. Step 3: Cross multiply
    319,389.21x = 478,265.67 × 309,929.22
  4. Step 4: Simplify right side
    319,389.21x = 148,228,506,055.88
  5. Step 5: Solve for x
    x = 148,228,506,055.88/319,389.21
  6. Step 6: Final answer
    x = 464,099.92

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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.