Home / 280,715.02-387,387.71-153,390.61

Finding the Fourth Proportional to 280,715.02, 387,387.71 and 153,390.61

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Solution

The fourth proportional to 280,715.02, 387,387.71 and 153,390.61 is: 211,679.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,715.02 : 387,387.71 = 153,390.61 : x
  2. Step 2: Convert to fraction form
    280,715.02/387,387.71 = 153,390.61/x
  3. Step 3: Cross multiply
    280,715.02x = 387,387.71 × 153,390.61
  4. Step 4: Simplify right side
    280,715.02x = 59,421,638,298.72
  5. Step 5: Solve for x
    x = 59,421,638,298.72/280,715.02
  6. Step 6: Final answer
    x = 211,679.58

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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.