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Finding the Fourth Proportional to 280,384.86, 386,929.08 and 153,060.42

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Solution

The fourth proportional to 280,384.86, 386,929.08 and 153,060.42 is: 211,222.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,384.86 : 386,929.08 = 153,060.42 : x
  2. Step 2: Convert to fraction form
    280,384.86/386,929.08 = 153,060.42/x
  3. Step 3: Cross multiply
    280,384.86x = 386,929.08 × 153,060.42
  4. Step 4: Simplify right side
    280,384.86x = 59,223,527,495.01
  5. Step 5: Solve for x
    x = 59,223,527,495.01/280,384.86
  6. Step 6: Final answer
    x = 211,222.27

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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.