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Finding the Fourth Proportional to 525,663.40, 788,495.10 and 407,698.60

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Solution

The fourth proportional to 525,663.40, 788,495.10 and 407,698.60 is: 611,547.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,663.40 : 788,495.10 = 407,698.60 : x
  2. Step 2: Convert to fraction form
    525,663.40/788,495.10 = 407,698.60/x
  3. Step 3: Cross multiply
    525,663.40x = 788,495.10 × 407,698.60
  4. Step 4: Simplify right side
    525,663.40x = 321,468,348,376.86
  5. Step 5: Solve for x
    x = 321,468,348,376.86/525,663.40
  6. Step 6: Final answer
    x = 611,547.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.