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Finding the Fourth Proportional to 642,078.40, 961,274.40 and 623,646.40

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Solution

The fourth proportional to 642,078.40, 961,274.40 and 623,646.40 is: 933,679.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,078.40 : 961,274.40 = 623,646.40 : x
  2. Step 2: Convert to fraction form
    642,078.40/961,274.40 = 623,646.40/x
  3. Step 3: Cross multiply
    642,078.40x = 961,274.40 × 623,646.40
  4. Step 4: Simplify right side
    642,078.40x = 599,495,318,972.16
  5. Step 5: Solve for x
    x = 599,495,318,972.16/642,078.40
  6. Step 6: Final answer
    x = 933,679.31

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1.5x scale

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.