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Finding the Fourth Proportional to 621,821.80, 932,271.90 and 421,642.60

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Solution

The fourth proportional to 621,821.80, 932,271.90 and 421,642.60 is: 632,151.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,821.80 : 932,271.90 = 421,642.60 : x
  2. Step 2: Convert to fraction form
    621,821.80/932,271.90 = 421,642.60/x
  3. Step 3: Cross multiply
    621,821.80x = 932,271.90 × 421,642.60
  4. Step 4: Simplify right side
    621,821.80x = 393,085,547,822.94
  5. Step 5: Solve for x
    x = 393,085,547,822.94/621,821.80
  6. Step 6: Final answer
    x = 632,151.44

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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.