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Finding the Fourth Proportional to 472,393,871.80, 708,590,807.70 and 407,770,646.20

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Solution

The fourth proportional to 472,393,871.80, 708,590,807.70 and 407,770,646.20 is: 611,655,969.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    472,393,871.80 : 708,590,807.70 = 407,770,646.20 : x
  2. Step 2: Convert to fraction form
    472,393,871.80/708,590,807.70 = 407,770,646.20/x
  3. Step 3: Cross multiply
    472,393,871.80x = 708,590,807.70 × 407,770,646.20
  4. Step 4: Simplify right side
    472,393,871.80x = 288,942,531,547,208,960
  5. Step 5: Solve for x
    x = 288,942,531,547,208,960/472,393,871.80
  6. Step 6: Final answer
    x = 611,655,969.30

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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.