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Finding the Fourth Proportional to 280,908,000.30, 421,362,000.45 and 280,908,000.30

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Solution

The fourth proportional to 280,908,000.30, 421,362,000.45 and 280,908,000.30 is: 421,362,000.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,908,000.30 : 421,362,000.45 = 280,908,000.30 : x
  2. Step 2: Convert to fraction form
    280,908,000.30/421,362,000.45 = 280,908,000.30/x
  3. Step 3: Cross multiply
    280,908,000.30x = 421,362,000.45 × 280,908,000.30
  4. Step 4: Simplify right side
    280,908,000.30x = 118,363,956,948,817,200
  5. Step 5: Solve for x
    x = 118,363,956,948,817,200/280,908,000.30
  6. Step 6: Final answer
    x = 421,362,000.45

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1.5x scale

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.