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Finding the Fourth Proportional to 608,047.40, 912,071.10 and 408,981.80

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Solution

The fourth proportional to 608,047.40, 912,071.10 and 408,981.80 is: 613,472.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    608,047.40 : 912,071.10 = 408,981.80 : x
  2. Step 2: Convert to fraction form
    608,047.40/912,071.10 = 408,981.80/x
  3. Step 3: Cross multiply
    608,047.40x = 912,071.10 × 408,981.80
  4. Step 4: Simplify right side
    608,047.40x = 373,020,480,205.98
  5. Step 5: Solve for x
    x = 373,020,480,205.98/608,047.40
  6. Step 6: Final answer
    x = 613,472.70

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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.