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Finding the Fourth Proportional to 280,657.47, 387,717.12 and 242,866.11

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Solution

The fourth proportional to 280,657.47, 387,717.12 and 242,866.11 is: 335,509.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,657.47 : 387,717.12 = 242,866.11 : x
  2. Step 2: Convert to fraction form
    280,657.47/387,717.12 = 242,866.11/x
  3. Step 3: Cross multiply
    280,657.47x = 387,717.12 × 242,866.11
  4. Step 4: Simplify right side
    280,657.47x = 94,163,348,714.80
  5. Step 5: Solve for x
    x = 94,163,348,714.80/280,657.47
  6. Step 6: Final answer
    x = 335,509.86

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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.