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Finding the Fourth Proportional to 553,759.40, 830,639.10 and 455,344.40

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Solution

The fourth proportional to 553,759.40, 830,639.10 and 455,344.40 is: 683,016.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,759.40 : 830,639.10 = 455,344.40 : x
  2. Step 2: Convert to fraction form
    553,759.40/830,639.10 = 455,344.40/x
  3. Step 3: Cross multiply
    553,759.40x = 830,639.10 × 455,344.40
  4. Step 4: Simplify right side
    553,759.40x = 378,226,862,606.04
  5. Step 5: Solve for x
    x = 378,226,862,606.04/553,759.40
  6. Step 6: Final answer
    x = 683,016.60

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Double scale
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Similar ratio
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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.