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Finding the Fourth Proportional to 664,362.80, 928,008.40 and 664,362.80

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Solution

The fourth proportional to 664,362.80, 928,008.40 and 664,362.80 is: 928,008.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,362.80 : 928,008.40 = 664,362.80 : x
  2. Step 2: Convert to fraction form
    664,362.80/928,008.40 = 664,362.80/x
  3. Step 3: Cross multiply
    664,362.80x = 928,008.40 × 664,362.80
  4. Step 4: Simplify right side
    664,362.80x = 616,534,259,047.52
  5. Step 5: Solve for x
    x = 616,534,259,047.52/664,362.80
  6. Step 6: Final answer
    x = 928,008.40

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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.