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Finding the Fourth Proportional to 520,985.04, 718,718.04 and 306,121.20

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Solution

The fourth proportional to 520,985.04, 718,718.04 and 306,121.20 is: 422,305.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,985.04 : 718,718.04 = 306,121.20 : x
  2. Step 2: Convert to fraction form
    520,985.04/718,718.04 = 306,121.20/x
  3. Step 3: Cross multiply
    520,985.04x = 718,718.04 × 306,121.20
  4. Step 4: Simplify right side
    520,985.04x = 220,014,828,866.45
  5. Step 5: Solve for x
    x = 220,014,828,866.45/520,985.04
  6. Step 6: Final answer
    x = 422,305.46

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.