Home / 430,428.90-645,643.35-288,711.30

Finding the Fourth Proportional to 430,428.90, 645,643.35 and 288,711.30

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Solution

The fourth proportional to 430,428.90, 645,643.35 and 288,711.30 is: 433,066.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,428.90 : 645,643.35 = 288,711.30 : x
  2. Step 2: Convert to fraction form
    430,428.90/645,643.35 = 288,711.30/x
  3. Step 3: Cross multiply
    430,428.90x = 645,643.35 × 288,711.30
  4. Step 4: Simplify right side
    430,428.90x = 186,404,530,914.86
  5. Step 5: Solve for x
    x = 186,404,530,914.86/430,428.90
  6. Step 6: Final answer
    x = 433,066.95

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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.