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Finding the Fourth Proportional to 622,706.50, 859,335.93 and 354,434.50

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Solution

The fourth proportional to 622,706.50, 859,335.93 and 354,434.50 is: 489,120.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    622,706.50 : 859,335.93 = 354,434.50 : x
  2. Step 2: Convert to fraction form
    622,706.50/859,335.93 = 354,434.50/x
  3. Step 3: Cross multiply
    622,706.50x = 859,335.93 × 354,434.50
  4. Step 4: Simplify right side
    622,706.50x = 304,578,300,681.59
  5. Step 5: Solve for x
    x = 304,578,300,681.59/622,706.50
  6. Step 6: Final answer
    x = 489,120.16

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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.