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Finding the Fourth Proportional to 870,865.83, 1,201,728.50 and 488,818.80

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Solution

The fourth proportional to 870,865.83, 1,201,728.50 and 488,818.80 is: 674,532.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,865.83 : 1,201,728.50 = 488,818.80 : x
  2. Step 2: Convert to fraction form
    870,865.83/1,201,728.50 = 488,818.80/x
  3. Step 3: Cross multiply
    870,865.83x = 1,201,728.50 × 488,818.80
  4. Step 4: Simplify right side
    870,865.83x = 587,427,480,851.71
  5. Step 5: Solve for x
    x = 587,427,480,851.71/870,865.83
  6. Step 6: Final answer
    x = 674,532.70

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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.