Home / 712,501.82-983,216.07-390,149.66

Finding the Fourth Proportional to 712,501.82, 983,216.07 and 390,149.66

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Solution

The fourth proportional to 712,501.82, 983,216.07 and 390,149.66 is: 538,386.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,501.82 : 983,216.07 = 390,149.66 : x
  2. Step 2: Convert to fraction form
    712,501.82/983,216.07 = 390,149.66/x
  3. Step 3: Cross multiply
    712,501.82x = 983,216.07 × 390,149.66
  4. Step 4: Simplify right side
    712,501.82x = 383,601,417,875.08
  5. Step 5: Solve for x
    x = 383,601,417,875.08/712,501.82
  6. Step 6: Final answer
    x = 538,386.58

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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.