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Finding the Fourth Proportional to 710,730.40, 1,065,706.80 and 289,530.40

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Solution

The fourth proportional to 710,730.40, 1,065,706.80 and 289,530.40 is: 434,137.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,730.40 : 1,065,706.80 = 289,530.40 : x
  2. Step 2: Convert to fraction form
    710,730.40/1,065,706.80 = 289,530.40/x
  3. Step 3: Cross multiply
    710,730.40x = 1,065,706.80 × 289,530.40
  4. Step 4: Simplify right side
    710,730.40x = 308,554,516,086.72
  5. Step 5: Solve for x
    x = 308,554,516,086.72/710,730.40
  6. Step 6: Final answer
    x = 434,137.21

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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.