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Finding the Fourth Proportional to 215,807,713.80, 323,711,570.70 and 190,865,416.20

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Solution

The fourth proportional to 215,807,713.80, 323,711,570.70 and 190,865,416.20 is: 286,298,124.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,807,713.80 : 323,711,570.70 = 190,865,416.20 : x
  2. Step 2: Convert to fraction form
    215,807,713.80/323,711,570.70 = 190,865,416.20/x
  3. Step 3: Cross multiply
    215,807,713.80x = 323,711,570.70 × 190,865,416.20
  4. Step 4: Simplify right side
    215,807,713.80x = 61,785,343,670,411,216
  5. Step 5: Solve for x
    x = 61,785,343,670,411,216/215,807,713.80
  6. Step 6: Final answer
    x = 286,298,124.30

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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.