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Finding the Fourth Proportional to 286,309.90, 429,513.45 and 86,628.70

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Solution

The fourth proportional to 286,309.90, 429,513.45 and 86,628.70 is: 129,957.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,309.90 : 429,513.45 = 86,628.70 : x
  2. Step 2: Convert to fraction form
    286,309.90/429,513.45 = 86,628.70/x
  3. Step 3: Cross multiply
    286,309.90x = 429,513.45 × 86,628.70
  4. Step 4: Simplify right side
    286,309.90x = 37,208,191,806.02
  5. Step 5: Solve for x
    x = 37,208,191,806.02/286,309.90
  6. Step 6: Final answer
    x = 129,957.75

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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.