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Finding the Fourth Proportional to 389,900.40, 583,554.60 and 282,980.40

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Solution

The fourth proportional to 389,900.40, 583,554.60 and 282,980.40 is: 423,529.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,900.40 : 583,554.60 = 282,980.40 : x
  2. Step 2: Convert to fraction form
    389,900.40/583,554.60 = 282,980.40/x
  3. Step 3: Cross multiply
    389,900.40x = 583,554.60 × 282,980.40
  4. Step 4: Simplify right side
    389,900.40x = 165,134,514,129.84
  5. Step 5: Solve for x
    x = 165,134,514,129.84/389,900.40
  6. Step 6: Final answer
    x = 423,529.99

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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.