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Finding the Fourth Proportional to 666,734.38, 920,109.65 and 380,281.12

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Solution

The fourth proportional to 666,734.38, 920,109.65 and 380,281.12 is: 524,797.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,734.38 : 920,109.65 = 380,281.12 : x
  2. Step 2: Convert to fraction form
    666,734.38/920,109.65 = 380,281.12/x
  3. Step 3: Cross multiply
    666,734.38x = 920,109.65 × 380,281.12
  4. Step 4: Simplify right side
    666,734.38x = 349,900,326,323.40
  5. Step 5: Solve for x
    x = 349,900,326,323.40/666,734.38
  6. Step 6: Final answer
    x = 524,797.19

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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.