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Finding the Fourth Proportional to 878,803.98, 1,212,702.39 and 496,807.98

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Solution

The fourth proportional to 878,803.98, 1,212,702.39 and 496,807.98 is: 685,568.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,803.98 : 1,212,702.39 = 496,807.98 : x
  2. Step 2: Convert to fraction form
    878,803.98/1,212,702.39 = 496,807.98/x
  3. Step 3: Cross multiply
    878,803.98x = 1,212,702.39 × 496,807.98
  4. Step 4: Simplify right side
    878,803.98x = 602,480,224,717.07
  5. Step 5: Solve for x
    x = 602,480,224,717.07/878,803.98
  6. Step 6: Final answer
    x = 685,568.38

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Double scale
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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.