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Finding the Fourth Proportional to 710,980.48, 981,153.60 and 388,685.44

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Solution

The fourth proportional to 710,980.48, 981,153.60 and 388,685.44 is: 536,386.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,980.48 : 981,153.60 = 388,685.44 : x
  2. Step 2: Convert to fraction form
    710,980.48/981,153.60 = 388,685.44/x
  3. Step 3: Cross multiply
    710,980.48x = 981,153.60 × 388,685.44
  4. Step 4: Simplify right side
    710,980.48x = 381,360,118,723.58
  5. Step 5: Solve for x
    x = 381,360,118,723.58/710,980.48
  6. Step 6: Final answer
    x = 536,386.20

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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.