Home / 687,730.10-1,031,595.15-214,411.70

Finding the Fourth Proportional to 687,730.10, 1,031,595.15 and 214,411.70

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Solution

The fourth proportional to 687,730.10, 1,031,595.15 and 214,411.70 is: 321,617.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,730.10 : 1,031,595.15 = 214,411.70 : x
  2. Step 2: Convert to fraction form
    687,730.10/1,031,595.15 = 214,411.70/x
  3. Step 3: Cross multiply
    687,730.10x = 1,031,595.15 × 214,411.70
  4. Step 4: Simplify right side
    687,730.10x = 221,186,069,823.26
  5. Step 5: Solve for x
    x = 221,186,069,823.26/687,730.10
  6. Step 6: Final answer
    x = 321,617.55

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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.