Home / 712,386.81-983,057.16-390,034.56

Finding the Fourth Proportional to 712,386.81, 983,057.16 and 390,034.56

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Solution

The fourth proportional to 712,386.81, 983,057.16 and 390,034.56 is: 538,227.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,386.81 : 983,057.16 = 390,034.56 : x
  2. Step 2: Convert to fraction form
    712,386.81/983,057.16 = 390,034.56/x
  3. Step 3: Cross multiply
    712,386.81x = 983,057.16 × 390,034.56
  4. Step 4: Simplify right side
    712,386.81x = 383,426,266,855.45
  5. Step 5: Solve for x
    x = 383,426,266,855.45/712,386.81
  6. Step 6: Final answer
    x = 538,227.63

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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.