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Finding the Fourth Proportional to 282,688.70, 390,107.49 and 153,624.56

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Solution

The fourth proportional to 282,688.70, 390,107.49 and 153,624.56 is: 212,000.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,688.70 : 390,107.49 = 153,624.56 : x
  2. Step 2: Convert to fraction form
    282,688.70/390,107.49 = 153,624.56/x
  3. Step 3: Cross multiply
    282,688.70x = 390,107.49 × 153,624.56
  4. Step 4: Simplify right side
    282,688.70x = 59,930,091,503.95
  5. Step 5: Solve for x
    x = 59,930,091,503.95/282,688.70
  6. Step 6: Final answer
    x = 212,000.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.