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Finding the Fourth Proportional to 357,290.48, 535,528.05 and 143,921.86

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Solution

The fourth proportional to 357,290.48, 535,528.05 and 143,921.86 is: 215,718.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    357,290.48 : 535,528.05 = 143,921.86 : x
  2. Step 2: Convert to fraction form
    357,290.48/535,528.05 = 143,921.86/x
  3. Step 3: Cross multiply
    357,290.48x = 535,528.05 × 143,921.86
  4. Step 4: Simplify right side
    357,290.48x = 77,074,194,171.99
  5. Step 5: Solve for x
    x = 77,074,194,171.99/357,290.48
  6. Step 6: Final answer
    x = 215,718.58

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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.