Home / 686,715.70-1,030,510.95-402,405.70

Finding the Fourth Proportional to 686,715.70, 1,030,510.95 and 402,405.70

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Solution

The fourth proportional to 686,715.70, 1,030,510.95 and 402,405.70 is: 603,864.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,715.70 : 1,030,510.95 = 402,405.70 : x
  2. Step 2: Convert to fraction form
    686,715.70/1,030,510.95 = 402,405.70/x
  3. Step 3: Cross multiply
    686,715.70x = 1,030,510.95 × 402,405.70
  4. Step 4: Simplify right side
    686,715.70x = 414,683,480,192.42
  5. Step 5: Solve for x
    x = 414,683,480,192.42/686,715.70
  6. Step 6: Final answer
    x = 603,864.86

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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.