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Finding the Fourth Proportional to 657,420.40, 985,450.20 and 357,266.80

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Solution

The fourth proportional to 657,420.40, 985,450.20 and 357,266.80 is: 535,530.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,420.40 : 985,450.20 = 357,266.80 : x
  2. Step 2: Convert to fraction form
    657,420.40/985,450.20 = 357,266.80/x
  3. Step 3: Cross multiply
    657,420.40x = 985,450.20 × 357,266.80
  4. Step 4: Simplify right side
    657,420.40x = 352,068,639,513.36
  5. Step 5: Solve for x
    x = 352,068,639,513.36/657,420.40
  6. Step 6: Final answer
    x = 535,530.45

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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.