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Finding the Fourth Proportional to 438,426.40, 657,639.60 and 438,426.40

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Solution

The fourth proportional to 438,426.40, 657,639.60 and 438,426.40 is: 657,639.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,426.40 : 657,639.60 = 438,426.40 : x
  2. Step 2: Convert to fraction form
    438,426.40/657,639.60 = 438,426.40/x
  3. Step 3: Cross multiply
    438,426.40x = 657,639.60 × 438,426.40
  4. Step 4: Simplify right side
    438,426.40x = 288,326,562,325.44
  5. Step 5: Solve for x
    x = 288,326,562,325.44/438,426.40
  6. Step 6: Final answer
    x = 657,639.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.