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Finding the Fourth Proportional to 438,071.70, 657,107.55 and 438,071.70

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Solution

The fourth proportional to 438,071.70, 657,107.55 and 438,071.70 is: 657,107.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,071.70 : 657,107.55 = 438,071.70 : x
  2. Step 2: Convert to fraction form
    438,071.70/657,107.55 = 438,071.70/x
  3. Step 3: Cross multiply
    438,071.70x = 657,107.55 × 438,071.70
  4. Step 4: Simplify right side
    438,071.70x = 287,860,221,511.34
  5. Step 5: Solve for x
    x = 287,860,221,511.34/438,071.70
  6. Step 6: Final answer
    x = 657,107.55

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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.