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Finding the Fourth Proportional to 618,378.24, 853,430.76 and 346,490.40

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Solution

The fourth proportional to 618,378.24, 853,430.76 and 346,490.40 is: 478,195.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,378.24 : 853,430.76 = 346,490.40 : x
  2. Step 2: Convert to fraction form
    618,378.24/853,430.76 = 346,490.40/x
  3. Step 3: Cross multiply
    618,378.24x = 853,430.76 × 346,490.40
  4. Step 4: Simplify right side
    618,378.24x = 295,705,565,404.70
  5. Step 5: Solve for x
    x = 295,705,565,404.70/618,378.24
  6. Step 6: Final answer
    x = 478,195.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.