Home / 712,317.57-983,009.09-390,057.65

Finding the Fourth Proportional to 712,317.57, 983,009.09 and 390,057.65

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Solution

The fourth proportional to 712,317.57, 983,009.09 and 390,057.65 is: 538,285.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,317.57 : 983,009.09 = 390,057.65 : x
  2. Step 2: Convert to fraction form
    712,317.57/983,009.09 = 390,057.65/x
  3. Step 3: Cross multiply
    712,317.57x = 983,009.09 × 390,057.65
  4. Step 4: Simplify right side
    712,317.57x = 383,430,215,574.04
  5. Step 5: Solve for x
    x = 383,430,215,574.04/712,317.57
  6. Step 6: Final answer
    x = 538,285.49

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Double scale
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Similar ratio
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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.