Home / 763,415.40-1,145,123.10-658,439.40

Finding the Fourth Proportional to 763,415.40, 1,145,123.10 and 658,439.40

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Solution

The fourth proportional to 763,415.40, 1,145,123.10 and 658,439.40 is: 987,659.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    763,415.40 : 1,145,123.10 = 658,439.40 : x
  2. Step 2: Convert to fraction form
    763,415.40/1,145,123.10 = 658,439.40/x
  3. Step 3: Cross multiply
    763,415.40x = 1,145,123.10 × 658,439.40
  4. Step 4: Simplify right side
    763,415.40x = 753,994,166,890.14
  5. Step 5: Solve for x
    x = 753,994,166,890.14/763,415.40
  6. Step 6: Final answer
    x = 987,659.10

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Double scale
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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.