Home / 645,989.10-891,456.28-359,509.11

Finding the Fourth Proportional to 645,989.10, 891,456.28 and 359,509.11

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Solution

The fourth proportional to 645,989.10, 891,456.28 and 359,509.11 is: 496,117.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,989.10 : 891,456.28 = 359,509.11 : x
  2. Step 2: Convert to fraction form
    645,989.10/891,456.28 = 359,509.11/x
  3. Step 3: Cross multiply
    645,989.10x = 891,456.28 × 359,509.11
  4. Step 4: Simplify right side
    645,989.10x = 320,486,653,826.71
  5. Step 5: Solve for x
    x = 320,486,653,826.71/645,989.10
  6. Step 6: Final answer
    x = 496,117.74

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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.