Home / 724,980.45-1,000,488.87-398,297.67

Finding the Fourth Proportional to 724,980.45, 1,000,488.87 and 398,297.67

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Solution

The fourth proportional to 724,980.45, 1,000,488.87 and 398,297.67 is: 549,659.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    724,980.45 : 1,000,488.87 = 398,297.67 : x
  2. Step 2: Convert to fraction form
    724,980.45/1,000,488.87 = 398,297.67/x
  3. Step 3: Cross multiply
    724,980.45x = 1,000,488.87 × 398,297.67
  4. Step 4: Simplify right side
    724,980.45x = 398,492,385,781.93
  5. Step 5: Solve for x
    x = 398,492,385,781.93/724,980.45
  6. Step 6: Final answer
    x = 549,659.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.