Home / 763,415.80-1,144,202.10-389,246.20

Finding the Fourth Proportional to 763,415.80, 1,144,202.10 and 389,246.20

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Solution

The fourth proportional to 763,415.80, 1,144,202.10 and 389,246.20 is: 583,399.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    763,415.80 : 1,144,202.10 = 389,246.20 : x
  2. Step 2: Convert to fraction form
    763,415.80/1,144,202.10 = 389,246.20/x
  3. Step 3: Cross multiply
    763,415.80x = 1,144,202.10 × 389,246.20
  4. Step 4: Simplify right side
    763,415.80x = 445,376,319,457.02
  5. Step 5: Solve for x
    x = 445,376,319,457.02/763,415.80
  6. Step 6: Final answer
    x = 583,399.40

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Double scale
Find fourth proportional to 763,416.80, 1,144,203.60 and 389,247.20
Similar ratio
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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.