Home / 724,385.20-1,087,355.40-409,457.20

Finding the Fourth Proportional to 724,385.20, 1,087,355.40 and 409,457.20

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Solution

The fourth proportional to 724,385.20, 1,087,355.40 and 409,457.20 is: 614,625.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    724,385.20 : 1,087,355.40 = 409,457.20 : x
  2. Step 2: Convert to fraction form
    724,385.20/1,087,355.40 = 409,457.20/x
  3. Step 3: Cross multiply
    724,385.20x = 1,087,355.40 × 409,457.20
  4. Step 4: Simplify right side
    724,385.20x = 445,225,497,488.88
  5. Step 5: Solve for x
    x = 445,225,497,488.88/724,385.20
  6. Step 6: Final answer
    x = 614,625.34

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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.