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Finding the Fourth Proportional to 661,030.20, 989,990.10 and 661,030.20

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Solution

The fourth proportional to 661,030.20, 989,990.10 and 661,030.20 is: 989,990.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,030.20 : 989,990.10 = 661,030.20 : x
  2. Step 2: Convert to fraction form
    661,030.20/989,990.10 = 661,030.20/x
  3. Step 3: Cross multiply
    661,030.20x = 989,990.10 × 661,030.20
  4. Step 4: Simplify right side
    661,030.20x = 654,413,353,801.02
  5. Step 5: Solve for x
    x = 654,413,353,801.02/661,030.20
  6. Step 6: Final answer
    x = 989,990.10

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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.