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Finding the Fourth Proportional to 476.55, 710.91 and 435.24

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Solution

The fourth proportional to 476.55, 710.91 and 435.24 is: 649.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    476.55 : 710.91 = 435.24 : x
  2. Step 2: Convert to fraction form
    476.55/710.91 = 435.24/x
  3. Step 3: Cross multiply
    476.55x = 710.91 × 435.24
  4. Step 4: Simplify right side
    476.55x = 309,416.47
  5. Step 5: Solve for x
    x = 309,416.47/476.55
  6. Step 6: Final answer
    x = 649.28

Related Problems

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Double scale
Find fourth proportional to 477.55, 712.40 and 436.24
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.