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Finding the Fourth Proportional to 345,484.80, 518,240 and 120,801.28

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Solution

The fourth proportional to 345,484.80, 518,240 and 120,801.28 is: 181,206.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,484.80 : 518,240 = 120,801.28 : x
  2. Step 2: Convert to fraction form
    345,484.80/518,240 = 120,801.28/x
  3. Step 3: Cross multiply
    345,484.80x = 518,240 × 120,801.28
  4. Step 4: Simplify right side
    345,484.80x = 62,604,055,347.20
  5. Step 5: Solve for x
    x = 62,604,055,347.20/345,484.80
  6. Step 6: Final answer
    x = 181,206.40

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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.