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Finding the Fourth Proportional to 664,364.80, 928,011.20 and 664,364.80

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Solution

The fourth proportional to 664,364.80, 928,011.20 and 664,364.80 is: 928,011.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,364.80 : 928,011.20 = 664,364.80 : x
  2. Step 2: Convert to fraction form
    664,364.80/928,011.20 = 664,364.80/x
  3. Step 3: Cross multiply
    664,364.80x = 928,011.20 × 664,364.80
  4. Step 4: Simplify right side
    664,364.80x = 616,537,975,285.76
  5. Step 5: Solve for x
    x = 616,537,975,285.76/664,364.80
  6. Step 6: Final answer
    x = 928,011.20

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Half scale
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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.