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Finding the Fourth Proportional to 626,990.76, 865,301.13 and 355,106.57

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Solution

The fourth proportional to 626,990.76, 865,301.13 and 355,106.57 is: 490,077.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    626,990.76 : 865,301.13 = 355,106.57 : x
  2. Step 2: Convert to fraction form
    626,990.76/865,301.13 = 355,106.57/x
  3. Step 3: Cross multiply
    626,990.76x = 865,301.13 × 355,106.57
  4. Step 4: Simplify right side
    626,990.76x = 307,274,111,964.92
  5. Step 5: Solve for x
    x = 307,274,111,964.92/626,990.76
  6. Step 6: Final answer
    x = 490,077.58

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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.