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Finding the Fourth Proportional to 761,578.64, 1,051,457.10 and 490,119.32

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Solution

The fourth proportional to 761,578.64, 1,051,457.10 and 490,119.32 is: 676,672.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    761,578.64 : 1,051,457.10 = 490,119.32 : x
  2. Step 2: Convert to fraction form
    761,578.64/1,051,457.10 = 490,119.32/x
  3. Step 3: Cross multiply
    761,578.64x = 1,051,457.10 × 490,119.32
  4. Step 4: Simplify right side
    761,578.64x = 515,339,438,861.17
  5. Step 5: Solve for x
    x = 515,339,438,861.17/761,578.64
  6. Step 6: Final answer
    x = 676,672.65

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Double scale
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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.