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Finding the Fourth Proportional to 710,850.78, 981,000.45 and 388,582.74

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Solution

The fourth proportional to 710,850.78, 981,000.45 and 388,582.74 is: 536,258.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,850.78 : 981,000.45 = 388,582.74 : x
  2. Step 2: Convert to fraction form
    710,850.78/981,000.45 = 388,582.74/x
  3. Step 3: Cross multiply
    710,850.78x = 981,000.45 × 388,582.74
  4. Step 4: Simplify right side
    710,850.78x = 381,199,842,802.23
  5. Step 5: Solve for x
    x = 381,199,842,802.23/710,850.78
  6. Step 6: Final answer
    x = 536,258.60

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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.