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Finding the Fourth Proportional to 503,721.20, 695,126.64 and 288,848.72

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Solution

The fourth proportional to 503,721.20, 695,126.64 and 288,848.72 is: 398,606.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    503,721.20 : 695,126.64 = 288,848.72 : x
  2. Step 2: Convert to fraction form
    503,721.20/695,126.64 = 288,848.72/x
  3. Step 3: Cross multiply
    503,721.20x = 695,126.64 × 288,848.72
  4. Step 4: Simplify right side
    503,721.20x = 200,786,440,201.90
  5. Step 5: Solve for x
    x = 200,786,440,201.90/503,721.20
  6. Step 6: Final answer
    x = 398,606.29

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1.5x scale

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.