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Finding the Fourth Proportional to 711,388.80, 997,603.20 and 711,388.80

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Solution

The fourth proportional to 711,388.80, 997,603.20 and 711,388.80 is: 997,603.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,388.80 : 997,603.20 = 711,388.80 : x
  2. Step 2: Convert to fraction form
    711,388.80/997,603.20 = 711,388.80/x
  3. Step 3: Cross multiply
    711,388.80x = 997,603.20 × 711,388.80
  4. Step 4: Simplify right side
    711,388.80x = 709,683,743,324.16
  5. Step 5: Solve for x
    x = 709,683,743,324.16/711,388.80
  6. Step 6: Final answer
    x = 997,603.20

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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 (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.