Home / 711,010,957.27-981,155,654.65-397,684,636.79

Finding the Fourth Proportional to 711,010,957.27, 981,155,654.65 and 397,684,636.79

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Solution

The fourth proportional to 711,010,957.27, 981,155,654.65 and 397,684,636.79 is: 548,782,724.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,010,957.27 : 981,155,654.65 = 397,684,636.79 : x
  2. Step 2: Convert to fraction form
    711,010,957.27/981,155,654.65 = 397,684,636.79/x
  3. Step 3: Cross multiply
    711,010,957.27x = 981,155,654.65 × 397,684,636.79
  4. Step 4: Simplify right side
    711,010,957.27x = 390,190,530,153,939,968
  5. Step 5: Solve for x
    x = 390,190,530,153,939,968/711,010,957.27
  6. Step 6: Final answer
    x = 548,782,724.32

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Double scale
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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.