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Finding the Fourth Proportional to 486,056.70, 729,085.05 and 385,673.40

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Solution

The fourth proportional to 486,056.70, 729,085.05 and 385,673.40 is: 578,510.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,056.70 : 729,085.05 = 385,673.40 : x
  2. Step 2: Convert to fraction form
    486,056.70/729,085.05 = 385,673.40/x
  3. Step 3: Cross multiply
    486,056.70x = 729,085.05 × 385,673.40
  4. Step 4: Simplify right side
    486,056.70x = 281,188,710,122.67
  5. Step 5: Solve for x
    x = 281,188,710,122.67/486,056.70
  6. Step 6: Final answer
    x = 578,510.10

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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.