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Finding the Fourth Proportional to 287,007.90, 430,511.85 and 247,641.90

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Solution

The fourth proportional to 287,007.90, 430,511.85 and 247,641.90 is: 371,462.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,007.90 : 430,511.85 = 247,641.90 : x
  2. Step 2: Convert to fraction form
    287,007.90/430,511.85 = 247,641.90/x
  3. Step 3: Cross multiply
    287,007.90x = 430,511.85 × 247,641.90
  4. Step 4: Simplify right side
    287,007.90x = 106,612,772,506.52
  5. Step 5: Solve for x
    x = 106,612,772,506.52/287,007.90
  6. Step 6: Final answer
    x = 371,462.85

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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.