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Finding the Fourth Proportional to 612,862.80, 919,985.40 and 473,240.40

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Solution

The fourth proportional to 612,862.80, 919,985.40 and 473,240.40 is: 710,394.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,862.80 : 919,985.40 = 473,240.40 : x
  2. Step 2: Convert to fraction form
    612,862.80/919,985.40 = 473,240.40/x
  3. Step 3: Cross multiply
    612,862.80x = 919,985.40 × 473,240.40
  4. Step 4: Simplify right side
    612,862.80x = 435,374,258,690.16
  5. Step 5: Solve for x
    x = 435,374,258,690.16/612,862.80
  6. Step 6: Final answer
    x = 710,394.33

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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.