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Finding the Fourth Proportional to 286,319.61, 429,478.94 and 73,087.49

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Solution

The fourth proportional to 286,319.61, 429,478.94 and 73,087.49 is: 109,631.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,319.61 : 429,478.94 = 73,087.49 : x
  2. Step 2: Convert to fraction form
    286,319.61/429,478.94 = 73,087.49/x
  3. Step 3: Cross multiply
    286,319.61x = 429,478.94 × 73,087.49
  4. Step 4: Simplify right side
    286,319.61x = 31,389,535,219.63
  5. Step 5: Solve for x
    x = 31,389,535,219.63/286,319.61
  6. Step 6: Final answer
    x = 109,631.10

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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.