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Finding the Fourth Proportional to 698,349.74, 963,691.56 and 407,988.23

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Solution

The fourth proportional to 698,349.74, 963,691.56 and 407,988.23 is: 563,005.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    698,349.74 : 963,691.56 = 407,988.23 : x
  2. Step 2: Convert to fraction form
    698,349.74/963,691.56 = 407,988.23/x
  3. Step 3: Cross multiply
    698,349.74x = 963,691.56 × 407,988.23
  4. Step 4: Simplify right side
    698,349.74x = 393,174,809,011.88
  5. Step 5: Solve for x
    x = 393,174,809,011.88/698,349.74
  6. Step 6: Final answer
    x = 563,005.60

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Double scale
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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.