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Finding the Fourth Proportional to 868,875.90, 1,302,147.45 and 619,266.30

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Solution

The fourth proportional to 868,875.90, 1,302,147.45 and 619,266.30 is: 928,068.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    868,875.90 : 1,302,147.45 = 619,266.30 : x
  2. Step 2: Convert to fraction form
    868,875.90/1,302,147.45 = 619,266.30/x
  3. Step 3: Cross multiply
    868,875.90x = 1,302,147.45 × 619,266.30
  4. Step 4: Simplify right side
    868,875.90x = 806,376,033,415.94
  5. Step 5: Solve for x
    x = 806,376,033,415.94/868,875.90
  6. Step 6: Final answer
    x = 928,068.13

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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.