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Finding the Fourth Proportional to 519,315.60, 778,973.40 and 519,315.60

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Solution

The fourth proportional to 519,315.60, 778,973.40 and 519,315.60 is: 778,973.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,315.60 : 778,973.40 = 519,315.60 : x
  2. Step 2: Convert to fraction form
    519,315.60/778,973.40 = 519,315.60/x
  3. Step 3: Cross multiply
    519,315.60x = 778,973.40 × 519,315.60
  4. Step 4: Simplify right side
    519,315.60x = 404,533,038,605.04
  5. Step 5: Solve for x
    x = 404,533,038,605.04/519,315.60
  6. Step 6: Final answer
    x = 778,973.40

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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.