Home / 1,390,400.80-2,085,601.20-443,802.40

Finding the Fourth Proportional to 1,390,400.80, 2,085,601.20 and 443,802.40

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Solution

The fourth proportional to 1,390,400.80, 2,085,601.20 and 443,802.40 is: 665,703.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390,400.80 : 2,085,601.20 = 443,802.40 : x
  2. Step 2: Convert to fraction form
    1,390,400.80/2,085,601.20 = 443,802.40/x
  3. Step 3: Cross multiply
    1,390,400.80x = 2,085,601.20 × 443,802.40
  4. Step 4: Simplify right side
    1,390,400.80x = 925,594,818,002.88
  5. Step 5: Solve for x
    x = 925,594,818,002.88/1,390,400.80
  6. Step 6: Final answer
    x = 665,703.60

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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.