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Finding the Fourth Proportional to 472,395,894.80, 708,593,842.20 and 278,207,353.40

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Solution

The fourth proportional to 472,395,894.80, 708,593,842.20 and 278,207,353.40 is: 417,311,030.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    472,395,894.80 : 708,593,842.20 = 278,207,353.40 : x
  2. Step 2: Convert to fraction form
    472,395,894.80/708,593,842.20 = 278,207,353.40/x
  3. Step 3: Cross multiply
    472,395,894.80x = 708,593,842.20 × 278,207,353.40
  4. Step 4: Simplify right side
    472,395,894.80x = 197,136,017,473,999,232
  5. Step 5: Solve for x
    x = 197,136,017,473,999,232/472,395,894.80
  6. Step 6: Final answer
    x = 417,311,030.10

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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.