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Finding the Fourth Proportional to 885.02, 1,221.47 and 637.16

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Solution

The fourth proportional to 885.02, 1,221.47 and 637.16 is: 879.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    885.02 : 1,221.47 = 637.16 : x
  2. Step 2: Convert to fraction form
    885.02/1,221.47 = 637.16/x
  3. Step 3: Cross multiply
    885.02x = 1,221.47 × 637.16
  4. Step 4: Simplify right side
    885.02x = 778,268.64
  5. Step 5: Solve for x
    x = 778,268.64/885.02
  6. Step 6: Final answer
    x = 879.38

Related Problems

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Half scale
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Double scale
Find fourth proportional to 886.02, 1,222.85 and 638.16
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.