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Finding the Fourth Proportional to 710,916.96, 981,063.18 and 388,627.20

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Solution

The fourth proportional to 710,916.96, 981,063.18 and 388,627.20 is: 536,304.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,916.96 : 981,063.18 = 388,627.20 : x
  2. Step 2: Convert to fraction form
    710,916.96/981,063.18 = 388,627.20/x
  3. Step 3: Cross multiply
    710,916.96x = 981,063.18 × 388,627.20
  4. Step 4: Simplify right side
    710,916.96x = 381,267,836,666.50
  5. Step 5: Solve for x
    x = 381,267,836,666.50/710,916.96
  6. Step 6: Final answer
    x = 536,304.32

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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.