Home / 712,308.10-982,985.05-390,018.14

Finding the Fourth Proportional to 712,308.10, 982,985.05 and 390,018.14

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Solution

The fourth proportional to 712,308.10, 982,985.05 and 390,018.14 is: 538,224.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,308.10 : 982,985.05 = 390,018.14 : x
  2. Step 2: Convert to fraction form
    712,308.10/982,985.05 = 390,018.14/x
  3. Step 3: Cross multiply
    712,308.10x = 982,985.05 × 390,018.14
  4. Step 4: Simplify right side
    712,308.10x = 383,382,000,848.81
  5. Step 5: Solve for x
    x = 383,382,000,848.81/712,308.10
  6. Step 6: Final answer
    x = 538,224.96

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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.