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Finding the Fourth Proportional to 578,653.20, 811,220.40 and 578,653.20

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Solution

The fourth proportional to 578,653.20, 811,220.40 and 578,653.20 is: 811,220.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,653.20 : 811,220.40 = 578,653.20 : x
  2. Step 2: Convert to fraction form
    578,653.20/811,220.40 = 578,653.20/x
  3. Step 3: Cross multiply
    578,653.20x = 811,220.40 × 578,653.20
  4. Step 4: Simplify right side
    578,653.20x = 469,415,280,365.28
  5. Step 5: Solve for x
    x = 469,415,280,365.28/578,653.20
  6. Step 6: Final answer
    x = 811,220.40

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Half scale
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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.