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Finding the Fourth Proportional to 904.26, 1,248.47 and 555.55

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Solution

The fourth proportional to 904.26, 1,248.47 and 555.55 is: 767.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    904.26 : 1,248.47 = 555.55 : x
  2. Step 2: Convert to fraction form
    904.26/1,248.47 = 555.55/x
  3. Step 3: Cross multiply
    904.26x = 1,248.47 × 555.55
  4. Step 4: Simplify right side
    904.26x = 693,587.51
  5. Step 5: Solve for x
    x = 693,587.51/904.26
  6. Step 6: Final answer
    x = 767.02

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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.