Home / 690,839.53-953,320.51-380,681.03

Finding the Fourth Proportional to 690,839.53, 953,320.51 and 380,681.03

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Solution

The fourth proportional to 690,839.53, 953,320.51 and 380,681.03 is: 525,318.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,839.53 : 953,320.51 = 380,681.03 : x
  2. Step 2: Convert to fraction form
    690,839.53/953,320.51 = 380,681.03/x
  3. Step 3: Cross multiply
    690,839.53x = 953,320.51 × 380,681.03
  4. Step 4: Simplify right side
    690,839.53x = 362,911,033,666.93
  5. Step 5: Solve for x
    x = 362,911,033,666.93/690,839.53
  6. Step 6: Final answer
    x = 525,318.86

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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.