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Finding the Fourth Proportional to 314,928,421.80, 472,392,632.70 and 198,702,275.10

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Solution

The fourth proportional to 314,928,421.80, 472,392,632.70 and 198,702,275.10 is: 298,053,412.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    314,928,421.80 : 472,392,632.70 = 198,702,275.10 : x
  2. Step 2: Convert to fraction form
    314,928,421.80/472,392,632.70 = 198,702,275.10/x
  3. Step 3: Cross multiply
    314,928,421.80x = 472,392,632.70 × 198,702,275.10
  4. Step 4: Simplify right side
    314,928,421.80x = 93,865,490,857,968,656
  5. Step 5: Solve for x
    x = 93,865,490,857,968,656/314,928,421.80
  6. Step 6: Final answer
    x = 298,053,412.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.