Home / 712,291.81-982,962.93-390,022.33

Finding the Fourth Proportional to 712,291.81, 982,962.93 and 390,022.33

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Solution

The fourth proportional to 712,291.81, 982,962.93 and 390,022.33 is: 538,230.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,291.81 : 982,962.93 = 390,022.33 : x
  2. Step 2: Convert to fraction form
    712,291.81/982,962.93 = 390,022.33/x
  3. Step 3: Cross multiply
    712,291.81x = 982,962.93 × 390,022.33
  4. Step 4: Simplify right side
    712,291.81x = 383,377,492,262.23
  5. Step 5: Solve for x
    x = 383,377,492,262.23/712,291.81
  6. Step 6: Final answer
    x = 538,230.94

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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.