Home / 686,871.40-1,030,307.10-313,623.40

Finding the Fourth Proportional to 686,871.40, 1,030,307.10 and 313,623.40

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Solution

The fourth proportional to 686,871.40, 1,030,307.10 and 313,623.40 is: 470,435.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,871.40 : 1,030,307.10 = 313,623.40 : x
  2. Step 2: Convert to fraction form
    686,871.40/1,030,307.10 = 313,623.40/x
  3. Step 3: Cross multiply
    686,871.40x = 1,030,307.10 × 313,623.40
  4. Step 4: Simplify right side
    686,871.40x = 323,128,415,746.14
  5. Step 5: Solve for x
    x = 323,128,415,746.14/686,871.40
  6. Step 6: Final answer
    x = 470,435.10

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.