Home / 918,865-1,268,111.46-516,534.76

Finding the Fourth Proportional to 918,865, 1,268,111.46 and 516,534.76

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Solution

The fourth proportional to 918,865, 1,268,111.46 and 516,534.76 is: 712,861.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,865 : 1,268,111.46 = 516,534.76 : x
  2. Step 2: Convert to fraction form
    918,865/1,268,111.46 = 516,534.76/x
  3. Step 3: Cross multiply
    918,865x = 1,268,111.46 × 516,534.76
  4. Step 4: Simplify right side
    918,865x = 655,023,648,644.35
  5. Step 5: Solve for x
    x = 655,023,648,644.35/918,865
  6. Step 6: Final answer
    x = 712,861.68

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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.