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Finding the Fourth Proportional to 398,655.65, 598,263.70 and 360,541.38

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Solution

The fourth proportional to 398,655.65, 598,263.70 and 360,541.38 is: 541,065.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,655.65 : 598,263.70 = 360,541.38 : x
  2. Step 2: Convert to fraction form
    398,655.65/598,263.70 = 360,541.38/x
  3. Step 3: Cross multiply
    398,655.65x = 598,263.70 × 360,541.38
  4. Step 4: Simplify right side
    398,655.65x = 215,698,817,640.80
  5. Step 5: Solve for x
    x = 215,698,817,640.80/398,655.65
  6. Step 6: Final answer
    x = 541,065.50

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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.