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Finding the Fourth Proportional to 280,072.62, 386,495.55 and 152,740.62

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Solution

The fourth proportional to 280,072.62, 386,495.55 and 152,740.62 is: 210,779.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,072.62 : 386,495.55 = 152,740.62 : x
  2. Step 2: Convert to fraction form
    280,072.62/386,495.55 = 152,740.62/x
  3. Step 3: Cross multiply
    280,072.62x = 386,495.55 × 152,740.62
  4. Step 4: Simplify right side
    280,072.62x = 59,033,569,934.24
  5. Step 5: Solve for x
    x = 59,033,569,934.24/280,072.62
  6. Step 6: Final answer
    x = 210,779.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.