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Finding the Fourth Proportional to 702,128.40, 1,051,637.40 and 577,712.40

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Solution

The fourth proportional to 702,128.40, 1,051,637.40 and 577,712.40 is: 865,288.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    702,128.40 : 1,051,637.40 = 577,712.40 : x
  2. Step 2: Convert to fraction form
    702,128.40/1,051,637.40 = 577,712.40/x
  3. Step 3: Cross multiply
    702,128.40x = 1,051,637.40 × 577,712.40
  4. Step 4: Simplify right side
    702,128.40x = 607,543,966,283.76
  5. Step 5: Solve for x
    x = 607,543,966,283.76/702,128.40
  6. Step 6: Final answer
    x = 865,288.98

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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.