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Finding the Fourth Proportional to 402,626.40, 603,210.60 and 318,937.20

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Solution

The fourth proportional to 402,626.40, 603,210.60 and 318,937.20 is: 477,828.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,626.40 : 603,210.60 = 318,937.20 : x
  2. Step 2: Convert to fraction form
    402,626.40/603,210.60 = 318,937.20/x
  3. Step 3: Cross multiply
    402,626.40x = 603,210.60 × 318,937.20
  4. Step 4: Simplify right side
    402,626.40x = 192,386,299,774.32
  5. Step 5: Solve for x
    x = 192,386,299,774.32/402,626.40
  6. Step 6: Final answer
    x = 477,828.33

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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.