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Finding the Fourth Proportional to 652,304.70, 978,457.05 and 439,728.30

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Solution

The fourth proportional to 652,304.70, 978,457.05 and 439,728.30 is: 659,592.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    652,304.70 : 978,457.05 = 439,728.30 : x
  2. Step 2: Convert to fraction form
    652,304.70/978,457.05 = 439,728.30/x
  3. Step 3: Cross multiply
    652,304.70x = 978,457.05 × 439,728.30
  4. Step 4: Simplify right side
    652,304.70x = 430,255,255,219.52
  5. Step 5: Solve for x
    x = 430,255,255,219.52/652,304.70
  6. Step 6: Final answer
    x = 659,592.45

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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.