Home / 985,510.90-1,478,266.35-425,638.90

Finding the Fourth Proportional to 985,510.90, 1,478,266.35 and 425,638.90

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Solution

The fourth proportional to 985,510.90, 1,478,266.35 and 425,638.90 is: 638,458.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    985,510.90 : 1,478,266.35 = 425,638.90 : x
  2. Step 2: Convert to fraction form
    985,510.90/1,478,266.35 = 425,638.90/x
  3. Step 3: Cross multiply
    985,510.90x = 1,478,266.35 × 425,638.90
  4. Step 4: Simplify right side
    985,510.90x = 629,207,663,121.02
  5. Step 5: Solve for x
    x = 629,207,663,121.02/985,510.90
  6. Step 6: Final answer
    x = 638,458.35

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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.