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Finding the Fourth Proportional to 841.83, 1,159.84 and 631.68

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Solution

The fourth proportional to 841.83, 1,159.84 and 631.68 is: 870.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    841.83 : 1,159.84 = 631.68 : x
  2. Step 2: Convert to fraction form
    841.83/1,159.84 = 631.68/x
  3. Step 3: Cross multiply
    841.83x = 1,159.84 × 631.68
  4. Step 4: Simplify right side
    841.83x = 732,647.73
  5. Step 5: Solve for x
    x = 732,647.73/841.83
  6. Step 6: Final answer
    x = 870.30

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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.