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Finding the Fourth Proportional to 440,165.40, 659,664.90 and 390,010.20

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Solution

The fourth proportional to 440,165.40, 659,664.90 and 390,010.20 is: 584,498.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    440,165.40 : 659,664.90 = 390,010.20 : x
  2. Step 2: Convert to fraction form
    440,165.40/659,664.90 = 390,010.20/x
  3. Step 3: Cross multiply
    440,165.40x = 659,664.90 × 390,010.20
  4. Step 4: Simplify right side
    440,165.40x = 257,276,039,581.98
  5. Step 5: Solve for x
    x = 257,276,039,581.98/440,165.40
  6. Step 6: Final answer
    x = 584,498.55

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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.