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Finding the Fourth Proportional to 651.90, 899.19 and 430.86

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Solution

The fourth proportional to 651.90, 899.19 and 430.86 is: 594.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.90 : 899.19 = 430.86 : x
  2. Step 2: Convert to fraction form
    651.90/899.19 = 430.86/x
  3. Step 3: Cross multiply
    651.90x = 899.19 × 430.86
  4. Step 4: Simplify right side
    651.90x = 387,425.00
  5. Step 5: Solve for x
    x = 387,425.00/651.90
  6. Step 6: Final answer
    x = 594.30

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Double scale
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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.