Home / 830,521.20-1,247,164.20-456,812.40

Finding the Fourth Proportional to 830,521.20, 1,247,164.20 and 456,812.40

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Solution

The fourth proportional to 830,521.20, 1,247,164.20 and 456,812.40 is: 685,978.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    830,521.20 : 1,247,164.20 = 456,812.40 : x
  2. Step 2: Convert to fraction form
    830,521.20/1,247,164.20 = 456,812.40/x
  3. Step 3: Cross multiply
    830,521.20x = 1,247,164.20 × 456,812.40
  4. Step 4: Simplify right side
    830,521.20x = 569,720,071,396.08
  5. Step 5: Solve for x
    x = 569,720,071,396.08/830,521.20
  6. Step 6: Final answer
    x = 685,978.96

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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.