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Finding the Fourth Proportional to 868,665.60, 1,302,390.90 and 513,496.80

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Solution

The fourth proportional to 868,665.60, 1,302,390.90 and 513,496.80 is: 769,886.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    868,665.60 : 1,302,390.90 = 513,496.80 : x
  2. Step 2: Convert to fraction form
    868,665.60/1,302,390.90 = 513,496.80/x
  3. Step 3: Cross multiply
    868,665.60x = 1,302,390.90 × 513,496.80
  4. Step 4: Simplify right side
    868,665.60x = 668,773,559,499.12
  5. Step 5: Solve for x
    x = 668,773,559,499.12/868,665.60
  6. Step 6: Final answer
    x = 769,886.09

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1.5x scale

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.