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Finding the Fourth Proportional to 626,430.84, 864,480.90 and 339,953.40

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Solution

The fourth proportional to 626,430.84, 864,480.90 and 339,953.40 is: 469,139.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    626,430.84 : 864,480.90 = 339,953.40 : x
  2. Step 2: Convert to fraction form
    626,430.84/864,480.90 = 339,953.40/x
  3. Step 3: Cross multiply
    626,430.84x = 864,480.90 × 339,953.40
  4. Step 4: Simplify right side
    626,430.84x = 293,883,221,190.06
  5. Step 5: Solve for x
    x = 293,883,221,190.06/626,430.84
  6. Step 6: Final answer
    x = 469,139.13

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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.