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Finding the Fourth Proportional to 403,124.80, 604,687.20 and 340,139.20

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Solution

The fourth proportional to 403,124.80, 604,687.20 and 340,139.20 is: 510,208.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,124.80 : 604,687.20 = 340,139.20 : x
  2. Step 2: Convert to fraction form
    403,124.80/604,687.20 = 340,139.20/x
  3. Step 3: Cross multiply
    403,124.80x = 604,687.20 × 340,139.20
  4. Step 4: Simplify right side
    403,124.80x = 205,677,820,458.24
  5. Step 5: Solve for x
    x = 205,677,820,458.24/403,124.80
  6. Step 6: Final answer
    x = 510,208.80

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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.