Home / 784,438.60-1,175,102.70-428,816.20

Finding the Fourth Proportional to 784,438.60, 1,175,102.70 and 428,816.20

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Solution

The fourth proportional to 784,438.60, 1,175,102.70 and 428,816.20 is: 642,374.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    784,438.60 : 1,175,102.70 = 428,816.20 : x
  2. Step 2: Convert to fraction form
    784,438.60/1,175,102.70 = 428,816.20/x
  3. Step 3: Cross multiply
    784,438.60x = 1,175,102.70 × 428,816.20
  4. Step 4: Simplify right side
    784,438.60x = 503,903,074,423.74
  5. Step 5: Solve for x
    x = 503,903,074,423.74/784,438.60
  6. Step 6: Final answer
    x = 642,374.14

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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.