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Finding the Fourth Proportional to 840.76, 1,159.80 and 608.08

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Solution

The fourth proportional to 840.76, 1,159.80 and 608.08 is: 838.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    840.76 : 1,159.80 = 608.08 : x
  2. Step 2: Convert to fraction form
    840.76/1,159.80 = 608.08/x
  3. Step 3: Cross multiply
    840.76x = 1,159.80 × 608.08
  4. Step 4: Simplify right side
    840.76x = 705,251.18
  5. Step 5: Solve for x
    x = 705,251.18/840.76
  6. Step 6: Final answer
    x = 838.83

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.