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Finding the Fourth Proportional to 287,292.38, 430,938.56 and 90,300.38

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Solution

The fourth proportional to 287,292.38, 430,938.56 and 90,300.38 is: 135,450.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,292.38 : 430,938.56 = 90,300.38 : x
  2. Step 2: Convert to fraction form
    287,292.38/430,938.56 = 90,300.38/x
  3. Step 3: Cross multiply
    287,292.38x = 430,938.56 × 90,300.38
  4. Step 4: Simplify right side
    287,292.38x = 38,913,913,795.71
  5. Step 5: Solve for x
    x = 38,913,913,795.71/287,292.38
  6. Step 6: Final answer
    x = 135,450.56

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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.