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Finding the Fourth Proportional to 621,820.80, 932,270.40 and 421,641.60

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Solution

The fourth proportional to 621,820.80, 932,270.40 and 421,641.60 is: 632,149.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,820.80 : 932,270.40 = 421,641.60 : x
  2. Step 2: Convert to fraction form
    621,820.80/932,270.40 = 421,641.60/x
  3. Step 3: Cross multiply
    621,820.80x = 932,270.40 × 421,641.60
  4. Step 4: Simplify right side
    621,820.80x = 393,083,983,088.64
  5. Step 5: Solve for x
    x = 393,083,983,088.64/621,820.80
  6. Step 6: Final answer
    x = 632,149.94

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1.5x scale

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.