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Finding the Fourth Proportional to 878,846.40, 1,212,807.60 and 476,438.40

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Solution

The fourth proportional to 878,846.40, 1,212,807.60 and 476,438.40 is: 657,484.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,846.40 : 1,212,807.60 = 476,438.40 : x
  2. Step 2: Convert to fraction form
    878,846.40/1,212,807.60 = 476,438.40/x
  3. Step 3: Cross multiply
    878,846.40x = 1,212,807.60 × 476,438.40
  4. Step 4: Simplify right side
    878,846.40x = 577,828,112,451.84
  5. Step 5: Solve for x
    x = 577,828,112,451.84/878,846.40
  6. Step 6: Final answer
    x = 657,484.76

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.