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Finding the Fourth Proportional to 693,189.20, 972,564.40 and 693,189.20

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Solution

The fourth proportional to 693,189.20, 972,564.40 and 693,189.20 is: 972,564.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    693,189.20 : 972,564.40 = 693,189.20 : x
  2. Step 2: Convert to fraction form
    693,189.20/972,564.40 = 693,189.20/x
  3. Step 3: Cross multiply
    693,189.20x = 972,564.40 × 693,189.20
  4. Step 4: Simplify right side
    693,189.20x = 674,171,138,384.48
  5. Step 5: Solve for x
    x = 674,171,138,384.48/693,189.20
  6. Step 6: Final answer
    x = 972,564.40

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Double scale
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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.