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Finding the Fourth Proportional to 623,901.89, 860,985.18 and 337,421.98

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Solution

The fourth proportional to 623,901.89, 860,985.18 and 337,421.98 is: 465,642.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    623,901.89 : 860,985.18 = 337,421.98 : x
  2. Step 2: Convert to fraction form
    623,901.89/860,985.18 = 337,421.98/x
  3. Step 3: Cross multiply
    623,901.89x = 860,985.18 × 337,421.98
  4. Step 4: Simplify right side
    623,901.89x = 290,515,318,194.22
  5. Step 5: Solve for x
    x = 290,515,318,194.22/623,901.89
  6. Step 6: Final answer
    x = 465,642.64

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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.