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Finding the Fourth Proportional to 891,209.80, 1,337,009.10 and 260,072.20

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Solution

The fourth proportional to 891,209.80, 1,337,009.10 and 260,072.20 is: 390,165.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    891,209.80 : 1,337,009.10 = 260,072.20 : x
  2. Step 2: Convert to fraction form
    891,209.80/1,337,009.10 = 260,072.20/x
  3. Step 3: Cross multiply
    891,209.80x = 1,337,009.10 × 260,072.20
  4. Step 4: Simplify right side
    891,209.80x = 347,718,898,057.02
  5. Step 5: Solve for x
    x = 347,718,898,057.02/891,209.80
  6. Step 6: Final answer
    x = 390,165.03

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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.