Home / 763,090.20-1,145,153.70-426,130.20

Finding the Fourth Proportional to 763,090.20, 1,145,153.70 and 426,130.20

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Solution

The fourth proportional to 763,090.20, 1,145,153.70 and 426,130.20 is: 639,484.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    763,090.20 : 1,145,153.70 = 426,130.20 : x
  2. Step 2: Convert to fraction form
    763,090.20/1,145,153.70 = 426,130.20/x
  3. Step 3: Cross multiply
    763,090.20x = 1,145,153.70 × 426,130.20
  4. Step 4: Simplify right side
    763,090.20x = 487,984,575,211.74
  5. Step 5: Solve for x
    x = 487,984,575,211.74/763,090.20
  6. Step 6: Final answer
    x = 639,484.79

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Double scale
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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.