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Finding the Fourth Proportional to 611,688.20, 858,134.95 and 611,688.20

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Solution

The fourth proportional to 611,688.20, 858,134.95 and 611,688.20 is: 858,134.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,688.20 : 858,134.95 = 611,688.20 : x
  2. Step 2: Convert to fraction form
    611,688.20/858,134.95 = 611,688.20/x
  3. Step 3: Cross multiply
    611,688.20x = 858,134.95 × 611,688.20
  4. Step 4: Simplify right side
    611,688.20x = 524,911,022,922.59
  5. Step 5: Solve for x
    x = 524,911,022,922.59/611,688.20
  6. Step 6: Final answer
    x = 858,134.95

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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.