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Finding the Fourth Proportional to 280,608.41, 387,225.15 and 153,259.40

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Solution

The fourth proportional to 280,608.41, 387,225.15 and 153,259.40 is: 211,490.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,608.41 : 387,225.15 = 153,259.40 : x
  2. Step 2: Convert to fraction form
    280,608.41/387,225.15 = 153,259.40/x
  3. Step 3: Cross multiply
    280,608.41x = 387,225.15 × 153,259.40
  4. Step 4: Simplify right side
    280,608.41x = 59,345,894,153.91
  5. Step 5: Solve for x
    x = 59,345,894,153.91/280,608.41
  6. Step 6: Final answer
    x = 211,490.08

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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.