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Finding the Fourth Proportional to 666,862.56, 920,277.66 and 380,399.58

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Solution

The fourth proportional to 666,862.56, 920,277.66 and 380,399.58 is: 524,955.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,862.56 : 920,277.66 = 380,399.58 : x
  2. Step 2: Convert to fraction form
    666,862.56/920,277.66 = 380,399.58/x
  3. Step 3: Cross multiply
    666,862.56x = 920,277.66 × 380,399.58
  4. Step 4: Simplify right side
    666,862.56x = 350,073,235,347.38
  5. Step 5: Solve for x
    x = 350,073,235,347.38/666,862.56
  6. Step 6: Final answer
    x = 524,955.60

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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.