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Finding the Fourth Proportional to 520,098.40, 778,981.20 and 520,098.40

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Solution

The fourth proportional to 520,098.40, 778,981.20 and 520,098.40 is: 778,981.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,098.40 : 778,981.20 = 520,098.40 : x
  2. Step 2: Convert to fraction form
    520,098.40/778,981.20 = 520,098.40/x
  3. Step 3: Cross multiply
    520,098.40x = 778,981.20 × 520,098.40
  4. Step 4: Simplify right side
    520,098.40x = 405,146,875,750.08
  5. Step 5: Solve for x
    x = 405,146,875,750.08/520,098.40
  6. Step 6: Final answer
    x = 778,981.20

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1.5x scale

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.