Home / 763,411.40-1,145,117.10-687,303.80

Finding the Fourth Proportional to 763,411.40, 1,145,117.10 and 687,303.80

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Solution

The fourth proportional to 763,411.40, 1,145,117.10 and 687,303.80 is: 1,030,955.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    763,411.40 : 1,145,117.10 = 687,303.80 : x
  2. Step 2: Convert to fraction form
    763,411.40/1,145,117.10 = 687,303.80/x
  3. Step 3: Cross multiply
    763,411.40x = 1,145,117.10 × 687,303.80
  4. Step 4: Simplify right side
    763,411.40x = 787,043,334,274.98
  5. Step 5: Solve for x
    x = 787,043,334,274.98/763,411.40
  6. Step 6: Final answer
    x = 1,030,955.70

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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.