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Finding the Fourth Proportional to 620,417.16, 931,422.69 and 478,352.67

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Solution

The fourth proportional to 620,417.16, 931,422.69 and 478,352.67 is: 718,143.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,417.16 : 931,422.69 = 478,352.67 : x
  2. Step 2: Convert to fraction form
    620,417.16/931,422.69 = 478,352.67/x
  3. Step 3: Cross multiply
    620,417.16x = 931,422.69 × 478,352.67
  4. Step 4: Simplify right side
    620,417.16x = 445,548,530,660.08
  5. Step 5: Solve for x
    x = 445,548,530,660.08/620,417.16
  6. Step 6: Final answer
    x = 718,143.47

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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.