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Finding the Fourth Proportional to 618,926.40, 865,447.20 and 618,926.40

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Solution

The fourth proportional to 618,926.40, 865,447.20 and 618,926.40 is: 865,447.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,926.40 : 865,447.20 = 618,926.40 : x
  2. Step 2: Convert to fraction form
    618,926.40/865,447.20 = 618,926.40/x
  3. Step 3: Cross multiply
    618,926.40x = 865,447.20 × 618,926.40
  4. Step 4: Simplify right side
    618,926.40x = 535,648,119,886.08
  5. Step 5: Solve for x
    x = 535,648,119,886.08/618,926.40
  6. Step 6: Final answer
    x = 865,447.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.