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Finding the Fourth Proportional to 642,210.71, 886,279.95 and 355,730.76

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Solution

The fourth proportional to 642,210.71, 886,279.95 and 355,730.76 is: 490,924.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,210.71 : 886,279.95 = 355,730.76 : x
  2. Step 2: Convert to fraction form
    642,210.71/886,279.95 = 355,730.76/x
  3. Step 3: Cross multiply
    642,210.71x = 886,279.95 × 355,730.76
  4. Step 4: Simplify right side
    642,210.71x = 315,277,040,186.26
  5. Step 5: Solve for x
    x = 315,277,040,186.26/642,210.71
  6. Step 6: Final answer
    x = 490,924.61

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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.