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Finding the Fourth Proportional to 287,065.08, 430,433.52 and 87,326.40

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Solution

The fourth proportional to 287,065.08, 430,433.52 and 87,326.40 is: 130,939.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,065.08 : 430,433.52 = 87,326.40 : x
  2. Step 2: Convert to fraction form
    287,065.08/430,433.52 = 87,326.40/x
  3. Step 3: Cross multiply
    287,065.08x = 430,433.52 × 87,326.40
  4. Step 4: Simplify right side
    287,065.08x = 37,588,209,740.93
  5. Step 5: Solve for x
    x = 37,588,209,740.93/287,065.08
  6. Step 6: Final answer
    x = 130,939.68

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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.