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Finding the Fourth Proportional to 846.70, 1,270.08 and 435.63

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Solution

The fourth proportional to 846.70, 1,270.08 and 435.63 is: 653.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    846.70 : 1,270.08 = 435.63 : x
  2. Step 2: Convert to fraction form
    846.70/1,270.08 = 435.63/x
  3. Step 3: Cross multiply
    846.70x = 1,270.08 × 435.63
  4. Step 4: Simplify right side
    846.70x = 553,282.57
  5. Step 5: Solve for x
    x = 553,282.57/846.70
  6. Step 6: Final answer
    x = 653.46

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.