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Finding the Fourth Proportional to 314,928,281.20, 472,392,421.80 and 257,532,653.20

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Solution

The fourth proportional to 314,928,281.20, 472,392,421.80 and 257,532,653.20 is: 386,298,979.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    314,928,281.20 : 472,392,421.80 = 257,532,653.20 : x
  2. Step 2: Convert to fraction form
    314,928,281.20/472,392,421.80 = 257,532,653.20/x
  3. Step 3: Cross multiply
    314,928,281.20x = 472,392,421.80 × 257,532,653.20
  4. Step 4: Simplify right side
    314,928,281.20x = 121,656,473,737,727,520
  5. Step 5: Solve for x
    x = 121,656,473,737,727,520/314,928,281.20
  6. Step 6: Final answer
    x = 386,298,979.80

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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.