Home / 830,515.20-1,247,155.20-456,806.40

Finding the Fourth Proportional to 830,515.20, 1,247,155.20 and 456,806.40

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Solution

The fourth proportional to 830,515.20, 1,247,155.20 and 456,806.40 is: 685,969.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    830,515.20 : 1,247,155.20 = 456,806.40 : x
  2. Step 2: Convert to fraction form
    830,515.20/1,247,155.20 = 456,806.40/x
  3. Step 3: Cross multiply
    830,515.20x = 1,247,155.20 × 456,806.40
  4. Step 4: Simplify right side
    830,515.20x = 569,708,477,153.28
  5. Step 5: Solve for x
    x = 569,708,477,153.28/830,515.20
  6. Step 6: Final answer
    x = 685,969.96

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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.