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Finding the Fourth Proportional to 646,439.60, 971,214.60 and 578,010.80

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Solution

The fourth proportional to 646,439.60, 971,214.60 and 578,010.80 is: 868,406.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,439.60 : 971,214.60 = 578,010.80 : x
  2. Step 2: Convert to fraction form
    646,439.60/971,214.60 = 578,010.80/x
  3. Step 3: Cross multiply
    646,439.60x = 971,214.60 × 578,010.80
  4. Step 4: Simplify right side
    646,439.60x = 561,372,527,917.68
  5. Step 5: Solve for x
    x = 561,372,527,917.68/646,439.60
  6. Step 6: Final answer
    x = 868,406.77

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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.