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Finding the Fourth Proportional to 286,616.90, 429,925.35 and 86,927.60

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Solution

The fourth proportional to 286,616.90, 429,925.35 and 86,927.60 is: 130,391.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,616.90 : 429,925.35 = 86,927.60 : x
  2. Step 2: Convert to fraction form
    286,616.90/429,925.35 = 86,927.60/x
  3. Step 3: Cross multiply
    286,616.90x = 429,925.35 × 86,927.60
  4. Step 4: Simplify right side
    286,616.90x = 37,372,378,854.66
  5. Step 5: Solve for x
    x = 37,372,378,854.66/286,616.90
  6. Step 6: Final answer
    x = 130,391.40

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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.