Home / 286,528.08-429,643.76-128,620.56

Finding the Fourth Proportional to 286,528.08, 429,643.76 and 128,620.56

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Solution

The fourth proportional to 286,528.08, 429,643.76 and 128,620.56 is: 192,864.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,528.08 : 429,643.76 = 128,620.56 : x
  2. Step 2: Convert to fraction form
    286,528.08/429,643.76 = 128,620.56/x
  3. Step 3: Cross multiply
    286,528.08x = 429,643.76 × 128,620.56
  4. Step 4: Simplify right side
    286,528.08x = 55,261,021,011.71
  5. Step 5: Solve for x
    x = 55,261,021,011.71/286,528.08
  6. Step 6: Final answer
    x = 192,864.24

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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.