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Finding the Fourth Proportional to 516,455.79, 774,728.33 and 142,478.79

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Solution

The fourth proportional to 516,455.79, 774,728.33 and 142,478.79 is: 213,730.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    516,455.79 : 774,728.33 = 142,478.79 : x
  2. Step 2: Convert to fraction form
    516,455.79/774,728.33 = 142,478.79/x
  3. Step 3: Cross multiply
    516,455.79x = 774,728.33 × 142,478.79
  4. Step 4: Simplify right side
    516,455.79x = 110,382,355,037.12
  5. Step 5: Solve for x
    x = 110,382,355,037.12/516,455.79
  6. Step 6: Final answer
    x = 213,730.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.