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Finding the Fourth Proportional to 611,686.20, 858,132.15 and 611,686.20

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Solution

The fourth proportional to 611,686.20, 858,132.15 and 611,686.20 is: 858,132.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,686.20 : 858,132.15 = 611,686.20 : x
  2. Step 2: Convert to fraction form
    611,686.20/858,132.15 = 611,686.20/x
  3. Step 3: Cross multiply
    611,686.20x = 858,132.15 × 611,686.20
  4. Step 4: Simplify right side
    611,686.20x = 524,907,593,931.33
  5. Step 5: Solve for x
    x = 524,907,593,931.33/611,686.20
  6. Step 6: Final answer
    x = 858,132.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.