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Finding the Fourth Proportional to 285,620.10, 428,430.15 and 240,000.90

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Solution

The fourth proportional to 285,620.10, 428,430.15 and 240,000.90 is: 360,001.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,620.10 : 428,430.15 = 240,000.90 : x
  2. Step 2: Convert to fraction form
    285,620.10/428,430.15 = 240,000.90/x
  3. Step 3: Cross multiply
    285,620.10x = 428,430.15 × 240,000.90
  4. Step 4: Simplify right side
    285,620.10x = 102,823,621,587.14
  5. Step 5: Solve for x
    x = 102,823,621,587.14/285,620.10
  6. Step 6: Final answer
    x = 360,001.35

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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.