Home / 690,948.45-953,496.23-389,142.45

Finding the Fourth Proportional to 690,948.45, 953,496.23 and 389,142.45

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Solution

The fourth proportional to 690,948.45, 953,496.23 and 389,142.45 is: 537,009.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,948.45 : 953,496.23 = 389,142.45 : x
  2. Step 2: Convert to fraction form
    690,948.45/953,496.23 = 389,142.45/x
  3. Step 3: Cross multiply
    690,948.45x = 953,496.23 × 389,142.45
  4. Step 4: Simplify right side
    690,948.45x = 371,045,857,062.25
  5. Step 5: Solve for x
    x = 371,045,857,062.25/690,948.45
  6. Step 6: Final answer
    x = 537,009.46

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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.