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Finding the Fourth Proportional to 578,820.06, 798,706.81 and 320,632.40

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Solution

The fourth proportional to 578,820.06, 798,706.81 and 320,632.40 is: 442,436.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,820.06 : 798,706.81 = 320,632.40 : x
  2. Step 2: Convert to fraction form
    578,820.06/798,706.81 = 320,632.40/x
  3. Step 3: Cross multiply
    578,820.06x = 798,706.81 × 320,632.40
  4. Step 4: Simplify right side
    578,820.06x = 256,091,281,386.64
  5. Step 5: Solve for x
    x = 256,091,281,386.64/578,820.06
  6. Step 6: Final answer
    x = 442,436.78

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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.