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Finding the Fourth Proportional to 490,384.40, 676,483.68 and 425,765.74

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Solution

The fourth proportional to 490,384.40, 676,483.68 and 425,765.74 is: 587,342.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,384.40 : 676,483.68 = 425,765.74 : x
  2. Step 2: Convert to fraction form
    490,384.40/676,483.68 = 425,765.74/x
  3. Step 3: Cross multiply
    490,384.40x = 676,483.68 × 425,765.74
  4. Step 4: Simplify right side
    490,384.40x = 288,023,574,613.12
  5. Step 5: Solve for x
    x = 288,023,574,613.12/490,384.40
  6. Step 6: Final answer
    x = 587,342.45

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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.