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Finding the Fourth Proportional to 651.88, 899.20 and 430.75

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Solution

The fourth proportional to 651.88, 899.20 and 430.75 is: 594.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.88 : 899.20 = 430.75 : x
  2. Step 2: Convert to fraction form
    651.88/899.20 = 430.75/x
  3. Step 3: Cross multiply
    651.88x = 899.20 × 430.75
  4. Step 4: Simplify right side
    651.88x = 387,332.06
  5. Step 5: Solve for x
    x = 387,332.06/651.88
  6. Step 6: Final answer
    x = 594.18

Related Problems

Find fourth proportional to 325.94, 449.60 and 215.38
Half scale
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Double scale
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Similar ratio
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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.