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Finding the Fourth Proportional to 538,140.20, 807,210.30 and 480,079.40

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Solution

The fourth proportional to 538,140.20, 807,210.30 and 480,079.40 is: 720,119.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,140.20 : 807,210.30 = 480,079.40 : x
  2. Step 2: Convert to fraction form
    538,140.20/807,210.30 = 480,079.40/x
  3. Step 3: Cross multiply
    538,140.20x = 807,210.30 × 480,079.40
  4. Step 4: Simplify right side
    538,140.20x = 387,525,036,497.82
  5. Step 5: Solve for x
    x = 387,525,036,497.82/538,140.20
  6. Step 6: Final answer
    x = 720,119.10

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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.