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Finding the Fourth Proportional to 920.41, 1,270.14 and 500.77

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Solution

The fourth proportional to 920.41, 1,270.14 and 500.77 is: 691.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    920.41 : 1,270.14 = 500.77 : x
  2. Step 2: Convert to fraction form
    920.41/1,270.14 = 500.77/x
  3. Step 3: Cross multiply
    920.41x = 1,270.14 × 500.77
  4. Step 4: Simplify right side
    920.41x = 636,044.83
  5. Step 5: Solve for x
    x = 636,044.83/920.41
  6. Step 6: Final answer
    x = 691.05

Related Problems

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Half scale
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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.