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Finding the Fourth Proportional to 280,908,053.20, 421,362,079.80 and 235,558,421.20

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Solution

The fourth proportional to 280,908,053.20, 421,362,079.80 and 235,558,421.20 is: 353,337,631.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,908,053.20 : 421,362,079.80 = 235,558,421.20 : x
  2. Step 2: Convert to fraction form
    280,908,053.20/421,362,079.80 = 235,558,421.20/x
  3. Step 3: Cross multiply
    280,908,053.20x = 421,362,079.80 × 235,558,421.20
  4. Step 4: Simplify right side
    280,908,053.20x = 99,255,386,271,236,416
  5. Step 5: Solve for x
    x = 99,255,386,271,236,416/280,908,053.20
  6. Step 6: Final answer
    x = 353,337,631.80

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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.