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Finding the Fourth Proportional to 870,259.40, 1,200,978.68 and 488,314.43

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Solution

The fourth proportional to 870,259.40, 1,200,978.68 and 488,314.43 is: 673,885.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,259.40 : 1,200,978.68 = 488,314.43 : x
  2. Step 2: Convert to fraction form
    870,259.40/1,200,978.68 = 488,314.43/x
  3. Step 3: Cross multiply
    870,259.40x = 1,200,978.68 × 488,314.43
  4. Step 4: Simplify right side
    870,259.40x = 586,455,219,566.35
  5. Step 5: Solve for x
    x = 586,455,219,566.35/870,259.40
  6. Step 6: Final answer
    x = 673,885.53

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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.