Home / 687,730.60-1,031,595.90-538,431.40

Finding the Fourth Proportional to 687,730.60, 1,031,595.90 and 538,431.40

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Solution

The fourth proportional to 687,730.60, 1,031,595.90 and 538,431.40 is: 807,647.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,730.60 : 1,031,595.90 = 538,431.40 : x
  2. Step 2: Convert to fraction form
    687,730.60/1,031,595.90 = 538,431.40/x
  3. Step 3: Cross multiply
    687,730.60x = 1,031,595.90 × 538,431.40
  4. Step 4: Simplify right side
    687,730.60x = 555,443,624,671.26
  5. Step 5: Solve for x
    x = 555,443,624,671.26/687,730.60
  6. Step 6: Final answer
    x = 807,647.10

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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.