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Finding the Fourth Proportional to 859,813.60, 1,289,720.40 and 707,598.40

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Solution

The fourth proportional to 859,813.60, 1,289,720.40 and 707,598.40 is: 1,061,397.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    859,813.60 : 1,289,720.40 = 707,598.40 : x
  2. Step 2: Convert to fraction form
    859,813.60/1,289,720.40 = 707,598.40/x
  3. Step 3: Cross multiply
    859,813.60x = 1,289,720.40 × 707,598.40
  4. Step 4: Simplify right side
    859,813.60x = 912,604,091,487.36
  5. Step 5: Solve for x
    x = 912,604,091,487.36/859,813.60
  6. Step 6: Final answer
    x = 1,061,397.60

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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.