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Finding the Fourth Proportional to 620,615.19, 930,054.87 and 335,690.40

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Solution

The fourth proportional to 620,615.19, 930,054.87 and 335,690.40 is: 503,066.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,615.19 : 930,054.87 = 335,690.40 : x
  2. Step 2: Convert to fraction form
    620,615.19/930,054.87 = 335,690.40/x
  3. Step 3: Cross multiply
    620,615.19x = 930,054.87 × 335,690.40
  4. Step 4: Simplify right side
    620,615.19x = 312,210,491,332.25
  5. Step 5: Solve for x
    x = 312,210,491,332.25/620,615.19
  6. Step 6: Final answer
    x = 503,066.15

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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.