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Finding the Fourth Proportional to 440,420.68, 660,644.73 and 209,559.07

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Solution

The fourth proportional to 440,420.68, 660,644.73 and 209,559.07 is: 314,345.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    440,420.68 : 660,644.73 = 209,559.07 : x
  2. Step 2: Convert to fraction form
    440,420.68/660,644.73 = 209,559.07/x
  3. Step 3: Cross multiply
    440,420.68x = 660,644.73 × 209,559.07
  4. Step 4: Simplify right side
    440,420.68x = 138,444,095,219.20
  5. Step 5: Solve for x
    x = 138,444,095,219.20/440,420.68
  6. Step 6: Final answer
    x = 314,345.13

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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.